Dyfyniad APA

SAWKINS, F. J. A text in physical the evolving earth#Frederick J. Sawkins et.1l. Macmillan Publ.

Dyfyniad Arddull Chicago

SAWKINS, Frederick J. A Text in Physical the Evolving Earth#Frederick J. Sawkins Et.1l. Macmillan Publ.

Dyfyniad MLA

SAWKINS, Frederick J. A Text in Physical the Evolving Earth#Frederick J. Sawkins Et.1l. Macmillan Publ.

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