Gaya APA
Berek, J, S. (2004).
Practical Gynecologic Oncology .
United State of America:
Lippincott Williams and Wilkins.
Gaya MLA
Berek, Jonathan, S..
"Practical Gynecologic Oncology".
United State of America:
Lippincott Williams and Wilkins,
2004.
Text.