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APA Citation Style (7th edition)

Indirect sources (also referred to as secondary sources)

Secondary source (When an author quotes another author) (Sec. 8.6 APA Publication Manual, p.258)

  • APA cautions that you should, whenever possible, take material from the original source. Sometimes, however, only a secondary/indirect source is available.
  • When the year of the indirect source is known, include it in the text.
  • Only the source you have in hand is the one that goes into your Reference list.


Author, A.A. (date). Title of article: Subtitle information. Publisher.

Reference Example

King, K. M., Pierce, G., Folsom, L., Cessna, W., Jaggers, J. R., & Wintergerst, K. A. (2020). Championing whole-food and plant-based diets: The role of the health and fitness professional. ACSM’s Health & Fitness Journal, 24(4), 50–54.

In-text Example

Researchers, Tuso et al. "suggest that physicians recommend a plant-based diet to all patients, particularly those with high blood pressure, diabetes, cardiovascular disease, and obesity” (Tuso, 2013, as cited in King et al., 2020).