Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

Liu, C. L. Introduction to Combinatorial Mathematics. New York: McGraw-Hill Book Co., Inc, 1968.

Cita MLA (9a ed.)

Liu, C. L. Introduction to Combinatorial Mathematics. McGraw-Hill Book Co., Inc, 1968.