APA (7th ed.) Citation

IAVAZZO, C., VRACHNIS, N., & GKEGKES, I. D. Primary Umbilical Endometriosis: Villar's Nodule. Galenos Publishing House.

Chicago Style (17th ed.) Citation

IAVAZZO, Christos, Nikolaos VRACHNIS, and Ioannis D. GKEGKES. Primary Umbilical Endometriosis: Villar's Nodule. Galenos Publishing House.

MLA (9th ed.) Citation

IAVAZZO, Christos, et al. Primary Umbilical Endometriosis: Villar's Nodule. Galenos Publishing House.