APA (7e ed.) Bronvermelding

Das, B. C., & Mukherjee, B. N. Higher Trigonometry (26th ed.). U.N. Dhur & Sons.

Chicago (17e ed.) Bronvermelding

Das, B. C., en B. N. Mukherjee. Higher Trigonometry. 26th ed. Calcutta: U.N. Dhur & Sons.

MLA (9e ed.) Bronvermelding

Das, B. C., en B. N. Mukherjee. Higher Trigonometry. 26th ed. U.N. Dhur & Sons.