APA (7th ed.) Citation

Butler, B. C. M., & Bell, J. D. (1988). Interpretation of geological maps. Longman Scientific & Technical.

Chicago Style (17th ed.) Citation

Butler, B. C. M., and J. D. Bell. Interpretation of Geological Maps. Harlow: Longman Scientific & Technical, 1988.

MLA (8th ed.) Citation

Butler, B. C. M., and J. D. Bell. Interpretation of Geological Maps. Longman Scientific & Technical, 1988.