APA Edition Citation

Zhang, Y. (2011). Combinatorial problems in mathematical competitions. East china normal university.

Chicago Edition Citation

Zhang, Yao. Combinatorial Problems in Mathematical Competitions. Shanghai: East china normal university, 2011.

MLA Edition Citation

Zhang, Yao. Combinatorial Problems in Mathematical Competitions. East china normal university, 2011.

Warning: These citations may not always be 100% accurate.