British Geomorphological Research Group. (1981). Earth Surface Processes and Landforms. John Wiley & Sons.
Chicago-viite (17. p.)British Geomorphological Research Group. Earth Surface Processes and Landforms. Sussex, Inglaterra: John Wiley & Sons, 1981.
MLA-viite (8. p.)British Geomorphological Research Group. Earth Surface Processes and Landforms. John Wiley & Sons, 1981.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.