Cita APA (7a ed.)

Spencer, E. W. (1993). Geologic maps: A practical to the interpretation and preparation of geologic maps; for geologists, geograhers, engineers, and planners (1st. ed.). MacMillan.

Cita Chicago Style (17a ed.)

Spencer, Edgar W. Geologic Maps: A Practical to the Interpretation and Preparation of Geologic Maps; for Geologists, Geograhers, Engineers, and Planners. 1st. ed. New York, NY: MacMillan, 1993.

Cita MLA (8a ed.)

Spencer, Edgar W. Geologic Maps: A Practical to the Interpretation and Preparation of Geologic Maps; for Geologists, Geograhers, Engineers, and Planners. 1st. ed. MacMillan, 1993.