APA-referens (7:e uppl.)

Ashbourn, J. (2011). Geological landscapes of Britain. Springer.

Chicago-referens (17:e uppl.)

Ashbourn, Julian. Geological Landscapes of Britain. Dordrecht, London, New York: Springer, 2011.

MLA-referens (9:e uppl.)

Ashbourn, Julian. Geological Landscapes of Britain. Springer, 2011.