APA aipamena

Andreescu, T., & Andreescu, T. F. (2004). 103 trignometry problems. Birkhauser.

Chicago Style aipamena

Andreescu, Titu, and Titu; Feng Andreescu. 103 Trignometry Problems. Boston: Birkhauser, 2004.

MLA aipamena

Andreescu, Titu, and Titu; Feng Andreescu. 103 Trignometry Problems. Birkhauser, 2004.