APA aipamena

Cunningham, f. g. (2010). Williams Obstetrics. McGraw-Hill Book Company.

Chicago Style aipamena

Cunningham, f. gary. Williams Obstetrics. McGraw-Hill Book Company, 2010.

MLA aipamena

Cunningham, f. gary. Williams Obstetrics. McGraw-Hill Book Company, 2010.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.