Lua APA (7ú heag.)

Ayres, F. (1954). Theory & problems of Trigonemetry. Schaum Pub. Co.

Lua i Stíl Chicago (17ú heag.)

Ayres, Frank. Theory & Problems of Trigonemetry. New York: Schaum Pub. Co, 1954.

Lua MLA (9ú heag.)

Ayres, Frank. Theory & Problems of Trigonemetry. Schaum Pub. Co, 1954.

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