Choubey, K. R. Trigonometry: Course in Mathematics for the IIT-JEE and Other Engineering Entrance Examinations (1.). Pearson India.
Lua i Stíl Chicago (17ú heag.)Choubey, K. R.;Choubey. Trigonometry: Course in Mathematics for the IIT-JEE and Other Engineering Entrance Examinations. 1. Pearson India.
Lua MLA (8ú heag.)Choubey, K. R.;Choubey. Trigonometry: Course in Mathematics for the IIT-JEE and Other Engineering Entrance Examinations. 1. Pearson India.
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