APA Style
Walker, A, W. et al (1991).
Pediatric Gastrointestinal Disease: Pathophysiology, Diagnosis, Management. Vol.1 .
Philadelphia:
.C Decker Inc.
MLA Style
Walker, Allan, W. et al.
"Pediatric Gastrointestinal Disease: Pathophysiology, Diagnosis, Management. Vol.1".
Philadelphia:
.C Decker Inc,
1991.
print.