Παραπομπή APA

Andreescu, T., & Andreescu, T. A. (2007). 104 number theory problems. Birkhauser.

Παραπομπή Chicago Style

Andreescu, Titu, και Titu; Andrica Andreescu. 104 Number Theory Problems. Boston: Birkhauser, 2007.

Παραπομπή MLA

Andreescu, Titu, και Titu; Andrica Andreescu. 104 Number Theory Problems. Birkhauser, 2007.