APA (7th ed.) Citation

Freeman, T., & Boyer, R. E. (1971). Field guide to layered rocks. Houghton Mifflin.

Chicago Style (17th ed.) Citation

Freeman, Tom, and Robert E. Boyer. Field Guide to Layered Rocks. Boston: Houghton Mifflin, 1971.

MLA (9th ed.) Citation

Freeman, Tom, and Robert E. Boyer. Field Guide to Layered Rocks. Houghton Mifflin, 1971.