Hajós, G., Neukomm, G., & Surányi, J. (1977). Hungarian problem book. Mathematical Association of America.
Chicago Style (17th ed.) CitationHajós, György, Gyula Neukomm, and Janos Surányi. Hungarian Problem Book. Washington: Mathematical Association of America, 1977.
MLA (9th ed.) CitationHajós, György, et al. Hungarian Problem Book. Mathematical Association of America, 1977.