Lua APA (7ú heag.)
Pielou, E. C. (1991). After the Ice Age: The return of life to glaciated North America. University of Chicago Press.
Lua i Stíl Chicago (17ú heag.)
Pielou, E. C. After the Ice Age: The Return of Life to Glaciated North America. Chicago: University of Chicago Press, 1991.
Lua MLA (9ú heag.)
Pielou, E. C. After the Ice Age: The Return of Life to Glaciated North America. University of Chicago Press, 1991.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.