Cita APA (7a ed.)
ebrary, Inc, Leigh, R. B., & Liu, C. A. (2011). Hungarian problem book IV. Mathematical Association of America.
Cita Chicago Style (17a ed.)
ebrary, Inc, Robert Barrington Leigh, y Chiang-Fung Andrew Liu. Hungarian Problem Book IV. [Washington, D.C.]: Mathematical Association of America, 2011.
Cita MLA (9a ed.)
ebrary, Inc, et al. Hungarian Problem Book IV. Mathematical Association of America, 2011.
Precaución: Estas citas no son 100% exactas.