Palmer, J. A. (1998). Environmental education in the 21st centurytheory, practice, progress and promise. Routledge.
Chicago-viite (17. p.)Palmer, Joy A. Environmental Education in the 21st Centurytheory, Practice, Progress and Promise. Routledge, 1998.
MLA-viite (8. p.)Palmer, Joy A. Environmental Education in the 21st Centurytheory, Practice, Progress and Promise. Routledge, 1998.
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