Brualdi, R. A. (2004). Introductory combinatorics (4th ed.). Pearson/Prentice Hall.
Lua i Stíl Chicago (17ú heag.)Brualdi, Richard A. Introductory Combinatorics. 4th ed. Upper Saddle River, N.J. ; New Delhi: Pearson/Prentice Hall, 2004.
Lua MLA (8ú heag.)Brualdi, Richard A. Introductory Combinatorics. 4th ed. Pearson/Prentice Hall, 2004.
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