Dyfyniad APA

Ford, D., & Williams, P. (2007). Karst hydrogeology and geomorphology. John Wiley.

Dyfyniad Arddull Chicago

Ford, Derek, and Paul Williams. Karst Hydrogeology and Geomorphology. Chichester: John Wiley, 2007.

Dyfyniad MLA

Ford, Derek, and Paul Williams. Karst Hydrogeology and Geomorphology. John Wiley, 2007.

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