APA-referens (7:e uppl.)

Cheng, Z., Shuai, P., Qiao, Q., & Li, T. (2020). Validity and reliability of a simplified food frequency questionnaire. Nutrition Journal, 19(1), 1. https://doi.org/10.1186/s12937-020-00630-z

Chicago-referens (17:e uppl.)

Cheng, Zhengyan, Ping Shuai, Qichuan Qiao, och Tingxin Li. "Validity and Reliability of a Simplified Food Frequency Questionnaire." Nutrition Journal 19, no. 1 (2020): 1. https://doi.org/10.1186/s12937-020-00630-z.

MLA-referens (9:e uppl.)

Cheng, Zhengyan, et al. "Validity and Reliability of a Simplified Food Frequency Questionnaire." Nutrition Journal, vol. 19, no. 1, 2020, p. 1, https://doi.org/10.1186/s12937-020-00630-z.