APA (7th ed.) Citation
Thorpe, R. S., & Brown, G. C. (1985). The field description of igneous rocks. Open University press and Halsted press.
Chicago Style (17th ed.) Citation
Thorpe, Richard S., and Geoff C. Brown. The Field Description of Igneous Rocks. New York Toronto: Open University press and Halsted press, 1985.
MLA (9th ed.) Citation
Thorpe, Richard S., and Geoff C. Brown. The Field Description of Igneous Rocks. Open University press and Halsted press, 1985.
Warning: These citations may not always be 100% accurate.