Dyfyniad APA

Costa, J. E., & Baker, V. R. (1981). Surficial geology: Building with the earth. Wiley.

Dyfyniad Arddull Chicago

Costa, John E., and Victor R. Baker. Surficial Geology: Building with the Earth. New York: Wiley, 1981.

Dyfyniad MLA

Costa, John E., and Victor R. Baker. Surficial Geology: Building with the Earth. Wiley, 1981.

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