APA (7th ed.) Citation

Cox, D. P., & Cox, H. R. (1965). Introductory geology: A programmed text (Preliminary ed.). W. H. Freeman.

Chicago Style (17th ed.) Citation

Cox, Dennis P., and Helen R. Cox. Introductory Geology: A Programmed Text. Preliminary ed. San Francisco: W. H. Freeman, 1965.

MLA (9th ed.) Citation

Cox, Dennis P., and Helen R. Cox. Introductory Geology: A Programmed Text. Preliminary ed. W. H. Freeman, 1965.