Lua APA (7ú heag.)

Drooyan, I. (1983). Trigonometry: An analytic approach (4th ed.). Macmillan Publishing.

Lua i Stíl Chicago (17ú heag.)

Drooyan, Irving. Trigonometry: An Analytic Approach. 4th ed. New York: Macmillan Publishing, 1983.

Lua MLA (9ú heag.)

Drooyan, Irving. Trigonometry: An Analytic Approach. 4th ed. Macmillan Publishing, 1983.

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