British Geomorphological Research Group. (1976). Earth Surface Processes. John Wiley & Sons.
Citação do estilo Chicago (17ª ed.)British Geomorphological Research Group. Earth Surface Processes. Sussex, Inglaterra: John Wiley & Sons, 1976.
Citação MLA (8ª ed.)British Geomorphological Research Group. Earth Surface Processes. John Wiley & Sons, 1976.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.