APA (7th ed.) Citation

ebrary, Inc, Leigh, R. B., & Liu, C. A. (2011). Hungarian problem book IV. Mathematical Association of America.

Chicago Style (17th ed.) Citation

ebrary, Inc, Robert Barrington Leigh, and Chiang-Fung Andrew Liu. Hungarian Problem Book IV. [Washington, D.C.]: Mathematical Association of America, 2011.

MLA (9th ed.) Citation

ebrary, Inc, et al. Hungarian Problem Book IV. Mathematical Association of America, 2011.