APA

Jewell D., Gibson P., . (1985). Topics in gastroenterology. Londres: Blackwwell Scientific Publications.

Chicago

Jewell D.P, Gibson P.R, . 1985. Topics in gastroenterology. Londres: Blackwwell Scientific Publications.

Harvard

Jewell D., Gibson P., . (1985). Topics in gastroenterology. Londres: Blackwwell Scientific Publications.

MLA

Jewell D.P, Gibson P.R, . Topics in gastroenterology. Londres: Blackwwell Scientific Publications. 1985.