APA Citatie

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

Chicago Style citaat

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

MLA citatie

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

Let op: Deze citaties zijn niet altijd 100% accuraat.