APA (7th ed.) Citation

Hedberg, H. D. (1976). International stratigraphic guide: A guide to stratigraphic classification, terminology, and procedure. Wiley.

Chicago Style (17th ed.) Citation

Hedberg, Hollis Dow. International Stratigraphic Guide: A Guide to Stratigraphic Classification, Terminology, and Procedure. New York: Wiley, 1976.

MLA (9th ed.) Citation

Hedberg, Hollis Dow. International Stratigraphic Guide: A Guide to Stratigraphic Classification, Terminology, and Procedure. Wiley, 1976.