Gaya APA

Sachan, D, B., S.Lewis, J, D, W, B. (1997). Buku Saku Gastroenterologi . : EGC.

Gaya MLA

Sachan, David, B.., S.Lewis, Jerome, D., Waye,, Blair. "Buku Saku Gastroenterologi". : EGC, 1997. Text.