APA aipamena

Collins, J. H. (2012). Umbilical cord accidents. BioMed Central.

Chicago Style aipamena

Collins, Jason H. Umbilical Cord Accidents. BioMed Central, 2012.

MLA aipamena

Collins, Jason H. Umbilical Cord Accidents. BioMed Central, 2012.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.