APA

Truelove S., Kennedy H., . (1980). Topics in gastroenterology. Londres: Blackwwell Scientific Publications.

Chicago

Truelove S.C, Kennedy H.J, . 1980. Topics in gastroenterology. Londres: Blackwwell Scientific Publications.

Harvard

Truelove S., Kennedy H., . (1980). Topics in gastroenterology. Londres: Blackwwell Scientific Publications.

MLA

Truelove S.C, Kennedy H.J, . Topics in gastroenterology. Londres: Blackwwell Scientific Publications. 1980.