Lua APA (7ú heag.)
Powell, J. L. (2015). Four revolutions in the earth sciences: From heresy to truth. Columbia University Press.
Lua i Stíl Chicago (17ú heag.)
Powell, James Lawrence. Four Revolutions in the Earth Sciences: From Heresy to Truth. New York: Columbia University Press, 2015.
Lua MLA (9ú heag.)
Powell, James Lawrence. Four Revolutions in the Earth Sciences: From Heresy to Truth. Columbia University Press, 2015.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.