Barbeau, E., Klamkin, M. S., & Moser, W. O. J. (1995). Five hundred mathematical challenges. Mathematical Association of America.

Barbeau, Edward, Murray S. Klamkin, and W. O. J. Moser. Five Hundred Mathematical Challenges. [Washington, D.C.]: Mathematical Association of America, 1995.

Barbeau, Edward, et al. Five Hundred Mathematical Challenges. Mathematical Association of America, 1995.