APA (7th ed.) Citation

Geological Survey of India & Roy, B. C. (1963). Geological map of India. The Survey.

Chicago Style (17th ed.) Citation

Geological Survey of India and B. C. Roy. Geological Map of India. [Calcutta?]: The Survey, 1963.

MLA (9th ed.) Citation

Geological Survey of India and B. C. Roy. Geological Map of India. The Survey, 1963.

Warning: These citations may not always be 100% accurate.