Gaya APA
Doughty, D., Broadwell, D.
(1993).
Gastroinstestinal Disorders
.
St. Louis:
Mosby Year Book.
Gaya MLA
Doughty, Dorothy., Broadwell, Debra.
"Gastroinstestinal Disorders".
St. Louis:
Mosby Year Book,
1993.
Text.