Ross, K. A., & Charles R. B. Wright. (1999). Discrete mathematics (4th ed.). Prentice-Hall International, Inc.
Lua i Stíl Chicago (17ú heag.)Ross, Kenneth A., agus Charles R. B. Wright. Discrete Mathematics. 4th ed. Upper Saddle River, New Jersey: Prentice-Hall International, Inc, 1999.
Lua MLA (9ú heag.)Ross, Kenneth A., agus Charles R. B. Wright. Discrete Mathematics. 4th ed. Prentice-Hall International, Inc, 1999.
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