May, C., & Domínguez-Millán, R. Grading the sagging umbilicus. A novel classification for umbilical laxity: A prospective study in 191 patients. Elsevier.
Chicago Style (17th ed.) CitationMay, Caroll, and Rodrigo Domínguez-Millán. Grading the Sagging Umbilicus. A Novel Classification for Umbilical Laxity: A Prospective Study in 191 Patients. Elsevier.
MLA (9th ed.) CitationMay, Caroll, and Rodrigo Domínguez-Millán. Grading the Sagging Umbilicus. A Novel Classification for Umbilical Laxity: A Prospective Study in 191 Patients. Elsevier.
Warning: These citations may not always be 100% accurate.