APA (7th ed.) Citation

Andreescu, T., & Gelca, R. (2009). Mathematical Olympiad Challenges. Birkhäuser Boston.

Chicago Style (17th ed.) Citation

Andreescu, Titu, and Răzvan Gelca. Mathematical Olympiad Challenges. Boston, MA: Birkhäuser Boston, 2009.

MLA (8th ed.) Citation

Andreescu, Titu, and Răzvan Gelca. Mathematical Olympiad Challenges. Birkhäuser Boston, 2009.

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