Cunningham, F. G. (2011). Williams Obstetricia (23.ed.). Mc Graw Hill.
Chicago Style aipamenaCunningham, F. Gary. Williams Obstetricia. 23.ed. Mexico: Mc Graw Hill, 2011.
MLA aipamenaCunningham, F. Gary. Williams Obstetricia. 23.ed. Mc Graw Hill, 2011.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.