Dyfyniad APA

John Warvelle, H. 1. (1977). Probability Methods in Oil Exploration. Wiley Eastern.

Dyfyniad Arddull Chicago

John Warvelle, Harbaugh 1926. Probability Methods in Oil Exploration. New York: Wiley Eastern, 1977.

Dyfyniad MLA

John Warvelle, Harbaugh 1926. Probability Methods in Oil Exploration. Wiley Eastern, 1977.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.