APA (7th ed.) Citation

Honsberger, R. (1985). Mathematical gems. The Mathematical Association of America.

Chicago Style (17th ed.) Citation

Honsberger, Ross. Mathematical Gems. Washington, D.C: The Mathematical Association of America, 1985.

MLA (9th ed.) Citation

Honsberger, Ross. Mathematical Gems. The Mathematical Association of America, 1985.