APA (7th ed.) Citation

Andreescu, T., & Andrica, D. (2009). Number theory: Structures, examples, and problems. Birkhauser.

Chicago Style (17th ed.) Citation

Andreescu, Titu, and D. Andrica. Number Theory: Structures, Examples, and Problems. Boston: Birkhauser, 2009.

MLA (9th ed.) Citation

Andreescu, Titu, and D. Andrica. Number Theory: Structures, Examples, and Problems. Birkhauser, 2009.

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