Ensley, D. E., & Crawley, J. W. (2006). Discrete mathematics: Mathematical reasoning and proof with puzzles, patterns, and games. Wiley.
Chicago-referens (17:e uppl.)Ensley, Douglas E., och J. Winston Crawley. Discrete Mathematics: Mathematical Reasoning and Proof with Puzzles, Patterns, and Games. Hoboken, NJ: Wiley, 2006.
MLA-referens (9:e uppl.)Ensley, Douglas E., och J. Winston Crawley. Discrete Mathematics: Mathematical Reasoning and Proof with Puzzles, Patterns, and Games. Wiley, 2006.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.