Lua APA (7ú heag.)
Enger, E. D., & Smith, B. F. (1991). Enviromental science: A study of interrelationships (4th ed.). Wm.C.Brown.
Lua i Stíl Chicago (17ú heag.)
Enger, Eldon D., agus Bradley F. Smith. Enviromental Science: A Study of Interrelationships. 4th ed. Michigan: Wm.C.Brown, 1991.
Lua MLA (9ú heag.)
Enger, Eldon D., agus Bradley F. Smith. Enviromental Science: A Study of Interrelationships. 4th ed. Wm.C.Brown, 1991.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.