APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

IAglom, A. M., and I. M. IAglom. Challeging Mathematical Problems with Elementary Solutions. Dover Publications, 1987.