Cita APA

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

Citación estilo Chicago

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

Cita MLA

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