Gaya APA

Sadler, T. (2008, 2012, 2015). Langman's Medical Embryology (10, 11, 13). : Lippincott.

Gaya MLA

Sadler, T.W.. "Langman's Medical Embryology". 10, 11, 13 : Lippincott, 2008, 2012, 2015. Text.