Cita APA (7a ed.)

Sileri, P., & Gaspari, A. (2012). Anal fissure: Symptoms, diagnosis and treatment. Nova Science Publishers, Inc..

Cita Chicago Style (17a ed.)

Sileri, Pierpaolo, y Achille Gaspari. Anal Fissure: Symptoms, Diagnosis and Treatment. New York: Nova Science Publishers, Inc., 2012.

Cita MLA (8a ed.)

Sileri, Pierpaolo, y Achille Gaspari. Anal Fissure: Symptoms, Diagnosis and Treatment. Nova Science Publishers, Inc., 2012.