Balakrishnan, V. (1995). Schaum's outline of theory and problems of combinatorics. McGraw-Hill, Inc.
Lua i Stíl Chicago (17ú heag.)Balakrishnan, V.K. Schaum's Outline of Theory and Problems of Combinatorics. New York: McGraw-Hill, Inc, 1995.
Lua MLA (9ú heag.)Balakrishnan, V.K. Schaum's Outline of Theory and Problems of Combinatorics. McGraw-Hill, Inc, 1995.
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