Cita APA (7a ed.)

Azpiroz, F. (2000). Nongastrointestinal disorders in the irritable bowel syndrome. [s.n.].

Cita Chicago Style (17a ed.)

Azpiroz, Fernando. Nongastrointestinal Disorders in the Irritable Bowel Syndrome. [S.l.]: [s.n.], 2000.

Cita MLA (9a ed.)

Azpiroz, Fernando. Nongastrointestinal Disorders in the Irritable Bowel Syndrome. [s.n.], 2000.