Gaya APA

Clark, T., Swokowski, E, W. (1987). Fundamentals Of Trigonometry (Ed. 4). USA : by Prindle, Weber dan Schmidt,.

Gaya MLA

Clark, Thomas., Swokowski, Earl, W. "Fundamentals Of Trigonometry". Ed. 4 USA : by Prindle, Weber dan Schmidt,, 1987. Text.