Shamsul Hoq and others. (1968). Course of higher trigonometry. Muslim Book Agency.
Citazione stile Chigago Style (17a edizione)Shamsul Hoq and others. Course of Higher Trigonometry. Dacca: Muslim Book Agency, 1968.
Citatione MLA (9a ed.)Shamsul Hoq and others. Course of Higher Trigonometry. Muslim Book Agency, 1968.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.