Thomas, D. S. G. (2016). The dictionary of physical geography (4th ed.). John Wiley & Sons Inc.
Lua i Stíl Chicago (17ú heag.)Thomas, David S. G. The Dictionary of Physical Geography. 4th ed. Hoboken, NJ: John Wiley & Sons Inc, 2016.
Lua MLA (9ú heag.)Thomas, David S. G. The Dictionary of Physical Geography. 4th ed. John Wiley & Sons Inc, 2016.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.