Citação norma 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.

Citação norma Chicago

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

Citação norma MLA

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

Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.