Dyfyniad APA

Murck Barbara W., & Skinner Brian J. (1999). Geology Today Understanding Our Planet. American: John Wiley & Sons.

Dyfyniad Arddull Chicago

Murck Barbara W., và Skinner Brian J. Geology Today Understanding Our Planet. American: John Wiley & Sons, 1999.

Dyfyniad MLA

Murck Barbara W., và Skinner Brian J. Geology Today Understanding Our Planet. American: John Wiley & Sons, 1999.

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