Cita APA

Hedberb, H. D. (1976). International stratigraphic guide: A guide to stratigraphic classification, terminology and procedur. John Wiley & Sons.

Citación estilo Chicago

Hedberb, Hollis D. International Stratigraphic Guide: A Guide to Stratigraphic Classification, Terminology and Procedur. New York: John Wiley & Sons, 1976.

Cita MLA

Hedberb, Hollis D. International Stratigraphic Guide: A Guide to Stratigraphic Classification, Terminology and Procedur. John Wiley & Sons, 1976.