MLA

Chen, and Xin Zeng. Case Based Oral Mucosal Diseases. Springer Singapore, 2018.

APA

Chen, C., & Zeng, X. (2018). Case Based Oral Mucosal Diseases. Springer Singapore.

Chicago

Chen, and Xin Zeng. Case Based Oral Mucosal Diseases. : Springer Singapore, 2018.