APA

Keighley M. R. B., Williams N. S., . (1993). Surgery of the anus, rectum and colon. London: W.B. Saunders Company.

Chicago

Keighley Michael R B, Williams Norman S, . 1993. Surgery of the anus, rectum and colon. London: W.B. Saunders Company.

Harvard

Keighley M. R. B., Williams N. S., . (1993). Surgery of the anus, rectum and colon. London: W.B. Saunders Company.

MLA

Keighley Michael R B, Williams Norman S, . Surgery of the anus, rectum and colon. London: W.B. Saunders Company. 1993.