Cita APA (7a ed.)

Mahmud, S. (1985). A Text Book of Higher Trigonometry (5th ed.). The Ideal Library.

Cita Chicago Style (17a ed.)

Mahmud, Sultan. A Text Book of Higher Trigonometry. 5th ed. Dhaka: The Ideal Library, 1985.

Cita MLA (9a ed.)

Mahmud, Sultan. A Text Book of Higher Trigonometry. 5th ed. The Ideal Library, 1985.