Dyfyniad APA

Cullingford, R. (1980). Timescales in geomorphology. John Wiley and Sons.

Dyfyniad Arddull Chicago

Cullingford, R.A. Timescales in Geomorphology. New York: John Wiley and Sons, 1980.

Dyfyniad MLA

Cullingford, R.A. Timescales in Geomorphology. John Wiley and Sons, 1980.

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