APA-viite (7. p.)
Palmer, J. (1998). Environmental education in the 21st century: Theory, practice, progress and promise. Routledge.
Chicago-viite (17. p.)
Palmer, Joy. Environmental Education in the 21st Century: Theory, Practice, Progress and Promise. London ; New York: Routledge, 1998.
MLA-viite (9. p.)
Palmer, Joy. Environmental Education in the 21st Century: Theory, Practice, Progress and Promise. Routledge, 1998.
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