How can you tell if a source is primary or secondary?

To determine if a source is primary or secondary, ask yourself:

Was the source created by someone directly involved in the events you’re studying (primary), or by another researcher (secondary)?
Does the source provide original information (primary), or does it summarize information from other sources (secondary)?
Are you directly analyzing the source itself (primary), or only using it for background information (secondary)?

Some types of sources are nearly always primary: works of art and literature, raw statistical data, official documents and records, and personal communications (e.g. letters, interviews). If you use one of these in your research, it is probably a primary source.

Primary sources are often considered the most credible in terms of providing evidence for your argument, as they give you direct evidence of what you are researching. However, it’s up to you to ensure the information they provide is reliable and accurate.

Always make sure to properly cite your sources to avoid plagiarism.

Types of editing	Available at Scribbr?
Proofreading Correction of superficial mistakes, such as typos, misspellings, punctuation errors and consistency errors.	Yes! This is the “proofreading” in Scribbr’s standard service. It can only be selected in combination with editing.
Copy editing Focus on grammar, syntax, style, tone and the conventions of the field. The editor also considers the internal logic of the text and flags any obvious contradictions.	Yes! This is the “editing” in Scribbr’s standard service. It can only be selected in combination with proofreading.
Line editing Focus on language, style, concision and choices. The editor helps you strengthen your story, polish your sentences and ensure that your use of language drives home your ideas.	Yes! Select the Structure Check and Clarity Check to receive a comprehensive edit equivalent to a line edit.
Developmental editing (i.e. content editing, substantive editing) This is the first step of the editing process and applies to very early drafts. The editor helps you structure your ideas, decide what story to tell and find direction for your writing.	No. This kind of editing involves heavy rewriting and restructuring. Our editors cannot help with this.

Types of editing

Available at Scribbr?

Proofreading
Correction of superficial mistakes, such as typos, misspellings, punctuation errors and consistency errors.

Yes!
This is the “proofreading” in Scribbr’s standard service. It can only be selected in combination with editing.

Copy editing
Focus on grammar, syntax, style, tone and the conventions of the field. The editor also considers the internal logic of the text and flags any obvious contradictions.

Yes!
This is the “editing” in Scribbr’s standard service. It can only be selected in combination with proofreading.

Line editing
Focus on language, style, concision and choices. The editor helps you strengthen your story, polish your sentences and ensure that your use of language drives home your ideas.

Yes!
Select the Structure Check and Clarity Check to receive a comprehensive edit equivalent to a line edit.

Developmental editing (i.e. content editing, substantive editing)
This is the first step of the editing process and applies to very early drafts. The editor helps you structure your ideas, decide what story to tell and find direction for your writing.

No.
This kind of editing involves heavy rewriting and restructuring. Our editors cannot help with this.

Frequently asked questions

How can you tell if a source is primary or secondary?

Frequently asked questions: Referencing

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Frequently asked questions

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