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Citation & Referencing

What is a Signal Phrase? How to Introduce and Attribute Sources in Academic Writing

Learn how signal phrases introduce quotations and paraphrases effectively. Understand how they establish credibility and provide context for cited information.

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What is a Signal Phrase?

A signal phrase introduces a quote, paraphrase, or summary by identifying the author or source. It helps attribute information clearly and blend citations smoothly into your writing.

Examples of Signal Phrases

  • According to Smith (2020), …
  • Jones argues that …
  • As stated in the study by Brown and Lee, …

Why Signal Phrases Matter

  • Credibility: Shows that claims are supported by reliable sources.
  • Clarity: Helps readers distinguish between your ideas and others’.
  • Flow: Integrates citations naturally into text.

How to Use Signal Phrases Effectively

  1. Include the author’s name and publication year (APA) or name only (MLA).
  2. Use action verbs like 'argues,' 'explains,' 'claims,' or 'notes.'
  3. Maintain variety to avoid repetition.

Best Practices

  • Match the tone of the signal verb to the author’s intent.
  • Combine signal phrases with proper in-text citations.
  • Use them to transition smoothly between your ideas and supporting evidence.

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