Dyfyniad APA

Tarbuck, E. J., & Lutgens, F. K. (2000). Earth science: Edward J. Tarbuck, Frederick K. Lutgens (9th ed.). Prentice Hall.

Dyfyniad Arddull Chicago

Tarbuck, Edward J., and Frederick K. Lutgens. Earth Science: Edward J. Tarbuck, Frederick K. Lutgens. 9th ed. New Jersey: Prentice Hall, 2000.

Dyfyniad MLA

Tarbuck, Edward J., and Frederick K. Lutgens. Earth Science: Edward J. Tarbuck, Frederick K. Lutgens. 9th ed. Prentice Hall, 2000.

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