Cita APA

Hedberg, H. D. (1976). A guide to stratigraphic classification, terminology and procedure. US: John Wiley and Sons, New York.

Citación estilo Chicago

Hedberg, Hollis D. A Guide to Stratigraphic Classification, Terminology and Procedure. US: John Wiley and Sons, New York, 1976.

Cita MLA

Hedberg, Hollis D. A Guide to Stratigraphic Classification, Terminology and Procedure. US: John Wiley and Sons, New York, 1976.