APA Style

Marcdante, K, J., Nelson, W, E. (2011). Nelson essentials of pediatrics : Essentials of pediatrics (6th ed.). Philadelphia: Saunders/Elsevier.

MLA Style

Marcdante, Karen, J., Nelson, Waldo, Emerson. "Nelson essentials of pediatrics : Essentials of pediatrics". 6th ed. Philadelphia: Saunders/Elsevier, 2011. Text.