Gaya APA

Haubrich, J, E, B, ;, W, S. (1991). Gastrointestinal symptoms: clinical interpretation . philadelpia: b.c. decker.

Gaya MLA

Haubrich, J., Edward, Berk, ;, William, S.. "Gastrointestinal symptoms: clinical interpretation". philadelpia: b.c. decker, 1991. Text.