Citazione Stile APA (7a Edizione)

Liu, C. L. (1968). Introduction to combinatorial mathematics. McGraw-Hill.

Citazione stile Chigago Style (17a edizione)

Liu, Chung Laung. Introduction to Combinatorial Mathematics. Nueva York: McGraw-Hill, 1968.

Citatione MLA (9a ed.)

Liu, Chung Laung. Introduction to Combinatorial Mathematics. McGraw-Hill, 1968.