Hancock, B. D. (1992). ABC of colorectal diseases. Anal fissures and fistulas.
Chicago Style aipamenaHancock, B. D. ABC of Colorectal Diseases. Anal Fissures and Fistulas. 1992.
MLA aipamenaHancock, B. D. ABC of Colorectal Diseases. Anal Fissures and Fistulas. 1992.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.