APA Style

Walker, B, R. et al (2014). Davidson's principles and practice of medicine : Principles and practice of medicine (22nd ed.). Edinburgh: Churchill Livingstone/Elsevier.

MLA Style

Walker, Brian, R. et al. "Davidson's principles and practice of medicine : Principles and practice of medicine". 22nd ed. Edinburgh: Churchill Livingstone/Elsevier, 2014. Text.