APA (7th ed.) Citation

Higgins, M., Childs, O. E., & Lindberg, F. A. (1987). Correlation of stratigraphic units in North America. The Association.

Chicago Style (17th ed.) Citation

Higgins, Michael, Orlo E. Childs, and F. Alan Lindberg. Correlation of Stratigraphic Units in North America. Tulsa, Okla.: The Association, 1987.

MLA (9th ed.) Citation

Higgins, Michael, et al. Correlation of Stratigraphic Units in North America. The Association, 1987.