Gaya APA

Ensley, ., Crawley, W. (2005). Discrete Mathematics: Mathematical Reasoning and Proof with Puzzles, Patterns, and Games 1st Edition (Edition: 1). USA: wiley.

Gaya MLA

Ensley, ., Crawley, Winston. "Discrete Mathematics: Mathematical Reasoning and Proof with Puzzles, Patterns, and Games 1st Edition". Edition: 1 USA: wiley, 2005. Monograf.