APA aipamena

CUNNINGHAM, F. (2014). Williams Obstetri. McGraw-Hill Book Company.

Chicago Style aipamena

CUNNINGHAM, F.Gary. Williams Obstetri. McGraw-Hill Book Company, 2014.

MLA aipamena

CUNNINGHAM, F.Gary. Williams Obstetri. McGraw-Hill Book Company, 2014.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.