APA Style

P, G, R. (2009). Discrete and Combinatorial Mathematics (5 th ed 2007). Delhi: Dorling Kindersley (India) Pvt. Ltd..

MLA Style

P, GRIMALDI, RALPH. "Discrete and Combinatorial Mathematics". 5 th ed 2007 Delhi: Dorling Kindersley (India) Pvt. Ltd., 2009. Text.