MLA

Nayar, Ritu, David Wilbur, and David C Wilbur. The Bethesda System for Reporting Cervical Cytology. Springer International Publishing, 2015.

APA

Nayar, R., Wilbur, D., & Wilbur, D. C. (2015). The Bethesda System for Reporting Cervical Cytology. Springer International Publishing.

Chicago

Nayar, Ritu, David Wilbur, and David C Wilbur. The Bethesda System for Reporting Cervical Cytology. : Springer International Publishing, 2015.