APA (7th ed.) Citation

Spock, L. E. (1962). Guide to the study of rocks (2d ed.). Harper.

Chicago Style (17th ed.) Citation

Spock, L. E. Guide to the Study of Rocks. 2d ed. New York: Harper, 1962.

MLA (8th ed.) Citation

Spock, L. E. Guide to the Study of Rocks. 2d ed. Harper, 1962.