Purdue OWL

owl.purdue.edu ↗

Writing and citation reference for academic and professional tasks

Visit site ↗ Save

SI Score: 70/100
Pricing: Not confirmed
Free plan: Not confirmed
Sign-up required: Not confirmed

Citations writing-reference

Ask SI about Purdue OWL

Answers use saved listing facts and recorded sources.

What it does

Purdue OWL provides online reference material on writing, citation, plagiarism, resumes and other writing tasks.

Choose the guide that matches the document you are preparing. Citation formatting, a cover letter and an academic paragraph need different help. Use the example as a model for your own material.

Sources

Purdue OWL® - Purdue OWL® - Purdue University (Oct 26, 2026)

SI Score

70/100

#70 in Reference

Based on published information. No hands-on task test.

Method 2.0 · Published source review Assessed Oct 26, 2026Score ceiling for this evidence: 84/100.

Product usefulness 70

Evidence

The source names writing audiences and document-specific guidance, supporting documented audience fit.

Limits: AI review of saved source passages. No hands-on test, human approval or automatic-provider checker receipt.

Source links and check dates are in Sources and checks below.

Separate website checks

These checks do not add points to the SI Score. They inspect the website's HTML, not the product in use.

Basic website checksunknown

No check recorded.

HTML accessibility checksunknown

No check recorded.

Homepage HTML responseunknown

No check recorded.

Trackers in homepage HTMLunknown

No check recorded.

Page date hintsunknown

No check recorded.

Policy links do not verify a company's conduct. An HTML response time is not application speed. Tracker and accessibility checks miss behavior after page load. Copyright dates do not prove product upkeep.

How the SI Score works →

Unconfirmed details may be unassessed, absent from the pages checked or temporarily unreadable. A missing price does not mean the service is free.

Sources and checks

Supporting pages for product usefulness, site facts, prices and separate website checks. Each record keeps its own date. Reading a page does not establish how well the product performs in use.

owl.purdue.edu/
- Product usefulness evidenceChecked Oct 26, 2026

Browse this categoryMore Reference tools

Something wrong or out of date? Send a correction and an editor will check it against the site. Owners can verify their site first so their corrections are marked as coming from the owner. Owners cannot change the score.

Suggest a correction Claim this listing