Washburn, A. L. (1997). Plugs and plug circles: A basic form of patterned ground, Cornwallis Island, Arctic Canada ; origin and implications. Geological Soc. of America.
Chicago-Zitierstil (17. Ausg.)Washburn, Albert Lincoln. Plugs and Plug Circles: A Basic Form of Patterned Ground, Cornwallis Island, Arctic Canada ; Origin and Implications. Boulder, Colo: Geological Soc. of America, 1997.
MLA-Zitierstil (9. Ausg.)Washburn, Albert Lincoln. Plugs and Plug Circles: A Basic Form of Patterned Ground, Cornwallis Island, Arctic Canada ; Origin and Implications. Geological Soc. of America, 1997.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.