APA (7th ed.) Citation

Pearson, B. C., & Ellwood, K. B. (1987). Guide to the petroleum reference literature. Libraries Unlimited.

Chicago Style (17th ed.) Citation

Pearson, Barbara C., and Katherine B. Ellwood. Guide to the Petroleum Reference Literature. Littleton, Colo.: Libraries Unlimited, 1987.

MLA (8th ed.) Citation

Pearson, Barbara C., and Katherine B. Ellwood. Guide to the Petroleum Reference Literature. Libraries Unlimited, 1987.