APA (7th ed.) Citation

Li, M., Zhang, K., & Liu, C. Primary umbilical endometriosis: Clinical aspects and long-term follow-up of five cases. SAGE Publishing.

Chicago Style (17th ed.) Citation

Li, MengHui, KunNing Zhang, and ChongDong Liu. Primary Umbilical Endometriosis: Clinical Aspects and Long-term Follow-up of Five Cases. SAGE Publishing.

MLA (9th ed.) Citation

Li, MengHui, et al. Primary Umbilical Endometriosis: Clinical Aspects and Long-term Follow-up of Five Cases. SAGE Publishing.

Warning: These citations may not always be 100% accurate.