APA (7th ed.) Citation

PennWell Publishing Company, Nelson, P. C., Derby, J. R., & Hyne, N. J. (1985). Geological time: Useful microfossil ranges. PennWell Maps.

Chicago Style (17th ed.) Citation

PennWell Publishing Company, Penelope C. Nelson, James R. Derby, and Norman J. Hyne. Geological Time: Useful Microfossil Ranges. Tulsa, Okla.: PennWell Maps, 1985.

MLA (9th ed.) Citation

PennWell Publishing Company, et al. Geological Time: Useful Microfossil Ranges. PennWell Maps, 1985.