APA-viite (7. p.)

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

Chicago-viite (17. p.)

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

MLA-viite (9. p.)

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