Gaya APA

Schlenker, E, D., Gilbert, J. (2019). Williams' Essentials of Nutrition and Diet Therapy (Twelfth Edition). St. Louis: Elseiver inc..

Gaya MLA

Schlenker, Eleanor, D.., Gilbert, Joyce. "Williams' Essentials of Nutrition and Diet Therapy". Twelfth Edition St. Louis: Elseiver inc., 2019. Buku.