APA (7th ed.) Citation

Andreescu, T., Andrica, D., & Feng, Z. (2007). 104 Number Theory Problems: From the Training of the USA IMO Team. Birkhäuser Boston.

Chicago Style (17th ed.) Citation

Andreescu, Titu, Dorin Andrica, and Zuming Feng. 104 Number Theory Problems: From the Training of the USA IMO Team. Boston, MA: Birkhäuser Boston, 2007.

MLA (8th ed.) Citation

Andreescu, Titu, et al. 104 Number Theory Problems: From the Training of the USA IMO Team. Birkhäuser Boston, 2007.