APA

Truelove S., Ritchie J., . (1976). Topics in gastroenterology. Londres: Blackwwell Scientific Publications.

Chicago

Truelove S.C, Ritchie J.A, . 1976. Topics in gastroenterology. Londres: Blackwwell Scientific Publications.

Harvard

Truelove S., Ritchie J., . (1976). Topics in gastroenterology. Londres: Blackwwell Scientific Publications.

MLA

Truelove S.C, Ritchie J.A, . Topics in gastroenterology. Londres: Blackwwell Scientific Publications. 1976.