Gaya APA

Kelly, A, M, G, R, E, G, L, M. (1980). The William Lowell Putnam mathematical competition problems and solutions : 1938-1964 . United State of America: The Mathematical Assosiation of America.

Gaya MLA

Kelly, A., M., Gleason,, R., E., Greenwood,, L., M.. "The William Lowell Putnam mathematical competition problems and solutions : 1938-1964". United State of America: The Mathematical Assosiation of America, 1980. Text.