APA Style

Colledge, N, R., Walker, B, R. (2010). Davidson\'s Principles and Practice of Medicine (Twenty one Edition). Edinburgh, Scotland (Primary) : Churchill Livingstone / Elsevier.

MLA Style

Colledge, Nicki, R.., Walker, Brain, R.. "Davidson\'s Principles and Practice of Medicine". Twenty one Edition Edinburgh, Scotland (Primary) : Churchill Livingstone / Elsevier, 2010. Text.