APA

Marks G., Boggs H. W., Castro A. F., Gathright J. B., Ray J. E. & Salvati E. (19790829). Sigmoidoscopic examinations with rigid and flexible fiberoptic sigmoidoscopes in the surgeon's office: a comparative prospective study of effectiveness in 1,012 cases. : Diseases of the colon and rectum.

Chicago

Marks G, Boggs H W, Castro A F, Gathright J B, Ray J E and Salvati E. 19790829. Sigmoidoscopic examinations with rigid and flexible fiberoptic sigmoidoscopes in the surgeon's office: a comparative prospective study of effectiveness in 1,012 cases. : Diseases of the colon and rectum.

Harvard

Marks G., Boggs H. W., Castro A. F., Gathright J. B., Ray J. E. and Salvati E. (19790829). Sigmoidoscopic examinations with rigid and flexible fiberoptic sigmoidoscopes in the surgeon's office: a comparative prospective study of effectiveness in 1,012 cases. : Diseases of the colon and rectum.

MLA

Marks G, Boggs H W, Castro A F, Gathright J B, Ray J E and Salvati E. Sigmoidoscopic examinations with rigid and flexible fiberoptic sigmoidoscopes in the surgeon's office: a comparative prospective study of effectiveness in 1,012 cases. : Diseases of the colon and rectum. 19790829.