Lua APA (7ú heag.)

Lavorgna, G. M. (1998). Environment: Issues and alternatives (Rev. ed.). Kendall/Hunt.

Lua i Stíl Chicago (17ú heag.)

Lavorgna, Gary M. Environment: Issues and Alternatives. Rev. ed. Dubuque: Kendall/Hunt, 1998.

Lua MLA (9ú heag.)

Lavorgna, Gary M. Environment: Issues and Alternatives. Rev. ed. Kendall/Hunt, 1998.

Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.