APA Style

Smith, G. et al (2013). Smith and Aitkenhead's textbook of anaesthesia. (6th ed). New York: Churchill Livingstone/Elsevier.

MLA Style

Smith, Graham. et al. "Smith and Aitkenhead's textbook of anaesthesia.". 6th ed New York: Churchill Livingstone/Elsevier, 2013. Text.