Barbeau, E., Klamkin, M. S., & Moser, W. O. J. (1995). Five hundred mathematical challenges. Mathematical Association of America.
Lua i Stíl Chicago (17ú heag.)Barbeau, Edward, Murray S. Klamkin, agus W. O. J. Moser. Five Hundred Mathematical Challenges. [Washington, D.C.]: Mathematical Association of America, 1995.
Lua MLA (9ú heag.)Barbeau, Edward, et al. Five Hundred Mathematical Challenges. Mathematical Association of America, 1995.
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