Dyfyniad APA

Ragland, P. C. (1989). Basic analytical petrology. Oxford University Press.

Dyfyniad Arddull Chicago

Ragland, Paul C. Basic Analytical Petrology. New York: Oxford University Press, 1989.

Dyfyniad MLA

Ragland, Paul C. Basic Analytical Petrology. Oxford University Press, 1989.

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