APA (7th ed.) Citation

Andreescu, T., & Gelca, R. (2000). Mathematical olympiad challenges. Birkhäuser.

Chicago Style (17th ed.) Citation

Andreescu, Titu, and Răzvan Gelca. Mathematical Olympiad Challenges. Boston ; Basel ; Berlin: Birkhäuser, 2000.

MLA (9th ed.) Citation

Andreescu, Titu, and Răzvan Gelca. Mathematical Olympiad Challenges. Birkhäuser, 2000.

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