APA (7th ed.) Citation

Yaglom, A. M., & Yaglom, I. M. (1987). Challenging mathematical problems with elementary solutions. Dover Publications.

Chicago Style (17th ed.) Citation

Yaglom, A. M., and I. M. Yaglom. Challenging Mathematical Problems with Elementary Solutions. New York: Dover Publications, 1987.

MLA (8th ed.) Citation

Yaglom, A. M., and I. M. Yaglom. Challenging Mathematical Problems with Elementary Solutions. Dover Publications, 1987.

Warning: These citations may not always be 100% accurate.