MLA

Pitman, Martha Bishop, Lester Layfield, and Lester James Layfield. The Papanicolaou Society of Cytopathology System for Reporting Pancreaticobiliary Cytology. Springer International Publishing, 2015.

APA

Pitman, M. Bishop, Layfield, L., & Layfield, L. James. (2015). The Papanicolaou Society of Cytopathology System for Reporting Pancreaticobiliary Cytology. Springer International Publishing.

Chicago

Pitman, Martha Bishop, Lester Layfield, and Lester James Layfield. The Papanicolaou Society of Cytopathology System for Reporting Pancreaticobiliary Cytology. : Springer International Publishing, 2015.