APA
Truelove S., Lee E., . (1977). Topics in gastroenterology. Londres: Blackwwell Scientific Publications.
Chicago
Truelove S.C, Lee Emanoel, . 1977. Topics in gastroenterology. Londres: Blackwwell Scientific Publications.
Harvard
Truelove S., Lee E., . (1977). Topics in gastroenterology. Londres: Blackwwell Scientific Publications.
MLA
Truelove S.C, Lee Emanoel, . Topics in gastroenterology. Londres: Blackwwell Scientific Publications. 1977.