Douglas, S., & Durham, S. (1988). Anorectal malformations in children update 1988. Alan R. Liss.
Dyfyniad Arddull ChicagoDouglas, Stephens, and Smith Durham. Anorectal Malformations in Children Update 1988. New York: Alan R. Liss, 1988.
Dyfyniad MLADouglas, Stephens, and Smith Durham. Anorectal Malformations in Children Update 1988. Alan R. Liss, 1988.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.