APA Style

Kliegman, R, M. et al (2016). Nelson Textbook of Pediatrics - volume 2 (20th ed.). Phialdelphia,: Elsevier.

MLA Style

Kliegman, Robert, M.. et al. "Nelson Textbook of Pediatrics - volume 2". 20th ed. Phialdelphia,: Elsevier, 2016. Text.