Citazione Stile APA (7a Edizione)

Dunbar, C. O. (1957). Principles pf Stratigraphy (1st.). John Wiley & Sons, INC.

Citazione stile Chigago Style (17a edizione)

Dunbar, Carl O. Principles Pf Stratigraphy. 1st. New York: John Wiley & Sons, INC, 1957.

Citatione MLA (9a ed.)

Dunbar, Carl O. Principles Pf Stratigraphy. 1st. John Wiley & Sons, INC, 1957.