Παραπομπή APA

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

Παραπομπή Chicago Style

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

Παραπομπή MLA

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