APA

Jewell D., Mahida Y., . (1987). Topics in gastroenterology. Londres: Blackwell Scientific Publications.

Chicago

Jewell D.P, Mahida Y.R, . 1987. Topics in gastroenterology. Londres: Blackwell Scientific Publications.

Harvard

Jewell D., Mahida Y., . (1987). Topics in gastroenterology. Londres: Blackwell Scientific Publications.

MLA

Jewell D.P, Mahida Y.R, . Topics in gastroenterology. Londres: Blackwell Scientific Publications. 1987.