APA (7th ed.) Citation

Das, B. C., & Mukherjee, B. N. (1988). Higher Trigonometry. U. N. Dhur & Sons.

Chicago Style (17th ed.) Citation

Das, B. C., and B. N. Mukherjee. Higher Trigonometry. Kolkata: U. N. Dhur & Sons, 1988.

MLA (9th ed.) Citation

Das, B. C., and B. N. Mukherjee. Higher Trigonometry. U. N. Dhur & Sons, 1988.