Παραπομπή APA

Bagade, P. V., & Guirguis, M. M. (2009). Menstruating from the umbilicus as a rare case of primary umbilical endometriosis: A case report. BioMed Central.

Παραπομπή Chicago Style

Bagade, Pallavi V., και Mamdouh M. Guirguis. Menstruating From the Umbilicus As a Rare Case of Primary Umbilical Endometriosis: A Case Report. BioMed Central, 2009.

Παραπομπή MLA

Bagade, Pallavi V., και Mamdouh M. Guirguis. Menstruating From the Umbilicus As a Rare Case of Primary Umbilical Endometriosis: A Case Report. BioMed Central, 2009.

Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.