APA (7th ed.) Citation
Zhang, Y. (2011). Combinatorial problems in mathematical competitions. World Scientific.
Chicago Style (17th ed.) Citation
Zhang, Yao. Combinatorial Problems in Mathematical Competitions. Singapore: World Scientific, 2011.
MLA (9th ed.) Citation
Zhang, Yao. Combinatorial Problems in Mathematical Competitions. World Scientific, 2011.
Warning: These citations may not always be 100% accurate.