APA-referens (7:e uppl.)
Palmer, J. (1998). Environmental education in the 21st century: Theory, practice, progress and promise. Routledge.
Chicago-referens (17:e uppl.)
Palmer, Joy. Environmental Education in the 21st Century: Theory, Practice, Progress and Promise. London ; New York: Routledge, 1998.
MLA-referens (9:e uppl.)
Palmer, Joy. Environmental Education in the 21st Century: Theory, Practice, Progress and Promise. Routledge, 1998.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.