Mahmud, S. (1985). A Text Book of Higher Trigonometry (5th ed.). The Ideal Library.
Chicago-čujuhus (17. p.)Mahmud, Sultan. A Text Book of Higher Trigonometry. 5th ed. Dhaka: The Ideal Library, 1985.
MLA-čujuhus (9. p.)Mahmud, Sultan. A Text Book of Higher Trigonometry. 5th ed. The Ideal Library, 1985.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.