APA Style

Sirica, A, E., Longnecker, D, S. (1997). Gastroenterologypathobiology and pathophysiology . New York :: M. Dekker,.

MLA Style

Sirica, Alphonse, E.., Longnecker, Daniel, S.. "Gastroenterologypathobiology and pathophysiology". New York :: M. Dekker,, 1997. Text.