Palmer, J. A. (1998). Environmental education in the 21st centurytheory, practice, progress and promise. Routledge.
Lua i Stíl Chicago (17ú heag.)Palmer, Joy A. Environmental Education in the 21st Centurytheory, Practice, Progress and Promise. Routledge, 1998.
Lua MLA (8ú heag.)Palmer, Joy A. Environmental Education in the 21st Centurytheory, Practice, Progress and Promise. Routledge, 1998.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.