Παραπομπή APA

P Abbott & Hugh Neill. (2003). Teach yourself Trigonometry. Contemporary Books.

Παραπομπή Chicago Style

P Abbott και Hugh Neill. Teach Yourself Trigonometry. Chicago, IL: Contemporary Books, 2003.

Παραπομπή MLA

P Abbott και Hugh Neill. Teach Yourself Trigonometry. Contemporary Books, 2003.