Não informado. (2001). Environmental Education Research. Carfax Publishing.
Chicago-Zitierstil (17. Ausg.)Não informado. Environmental Education Research. Abingdon, Inglaterra: Carfax Publishing, 2001.
MLA-Zitierstil (8. Ausg.)Não informado. Environmental Education Research. Carfax Publishing, 2001.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.