Cunningham, F. G. (2006). Obstetricia de Williams (22 ed.). McGraw - Hill.
Chicago Style aipamenaCunningham, F. Gary. Obstetricia De Williams. 22 ed. México, D.F: McGraw - Hill, 2006.
MLA aipamenaCunningham, F. Gary. Obstetricia De Williams. 22 ed. McGraw - Hill, 2006.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.