Gaya APA

Sakala, E, P. (2019). USMLE Step 2 CK Lecture Notes 2019 ObstetricsGynecology . : Kaplan.

Gaya MLA

Sakala, Elmar, Peter. "USMLE Step 2 CK Lecture Notes 2019 ObstetricsGynecology". : Kaplan, 2019. Text.