Liu, C. L. (1968). Introduction to combinatorial mathematics. McGraw-Hill Book Co., Inc.
Lua i Stíl Chicago (17ú heag.)Liu, C. L. Introduction to Combinatorial Mathematics. New York: McGraw-Hill Book Co., Inc, 1968.
Lua MLA (9ú heag.)Liu, C. L. Introduction to Combinatorial Mathematics. McGraw-Hill Book Co., Inc, 1968.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.