Cita APA (7th ed.)

Beckenbach, E. F., & Drooyan, I. (1968). Modern college algebra and trigonometry. Wadsworth.

Cita Chicago (17th ed.)

Beckenbach, Edwin F., i Irving Drooyan. Modern College Algebra and Trigonometry. Belmont, Cal: Wadsworth, 1968.

Cita MLA (9th ed.)

Beckenbach, Edwin F., i Irving Drooyan. Modern College Algebra and Trigonometry. Wadsworth, 1968.