APA aipamena

Eastman. (1961). Williams obstetrics. Appleton Century-crofts.

Chicago Style aipamena

Eastman. Williams Obstetrics. Appleton Century-crofts, 1961.

MLA aipamena

Eastman. Williams Obstetrics. Appleton Century-crofts, 1961.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.