Gaya APA

Dunbar, C, O., Rodgers, J. (1957). Principles Of Stratigraphy (Wiley International Ed.). New York: John Wiley & Sons.

Gaya MLA

Dunbar, Carl, O.., Rodgers, John. "Principles Of Stratigraphy". Wiley International Ed. New York: John Wiley & Sons, 1957. Text.