Cita APA (7th ed.)

SpringerLink (Online service), Avital, S., Singer, M., & Ehrenpreis, E. D. (2012). Anal and rectal diseases: A concise manual. Springer New York.

Cita Chicago (17th ed.)

SpringerLink (Online service), Shmuel Avital, Mark Singer, i Eli D. Ehrenpreis. Anal and Rectal Diseases: A Concise Manual. New York, NY: Springer New York, 2012.

Cita MLA (8th ed.)

SpringerLink (Online service), et al. Anal and Rectal Diseases: A Concise Manual. Springer New York, 2012.