APA aipamena

Cunningham, F. G. (2011). Williams Obstetricia <i>es</i>.

Chicago Style aipamena

Cunningham, F. Gary. Williams Obstetricia <i>es</i>. 2011.

MLA aipamena

Cunningham, F. Gary. Williams Obstetricia <i>es</i>. 2011.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.