APA aipamena

Sparks, F. W. (1937). Plane trigonometry. Prentice-Hall.

Chicago Style aipamena

Sparks, Fred Winchell. Plane Trigonometry. New York: Prentice-Hall, 1937.

MLA aipamena

Sparks, Fred Winchell. Plane Trigonometry. Prentice-Hall, 1937.