Higgins, M., Childs, O. E., & Lindberg, F. A. (1987). Correlation of stratigraphic units in North America. The Association.
Chicago Style (17th ed.) CitationHiggins, Michael, Orlo E. Childs, and F. Alan Lindberg. Correlation of Stratigraphic Units in North America. Tulsa, Okla.: The Association, 1987.
MLA (9th ed.) CitationHiggins, Michael, et al. Correlation of Stratigraphic Units in North America. The Association, 1987.
Warning: These citations may not always be 100% accurate.