एपीए उद्धरण

Zhang, Y. (2011). Combinatorial problems in mathematical competitions. World Scientific.

शिकागो स्टाइल उद्धरण

Zhang, Yao. Combinatorial Problems in Mathematical Competitions. Singapore: World Scientific, 2011.

एमएलए उद्धरण

Zhang, Yao. Combinatorial Problems in Mathematical Competitions. World Scientific, 2011.