NCTE. (2005). Environmental education: A resource book for teacher educators, Level 1 (1.). Centre for environment education.
Styl ChicagoNCTE. Environmental Education: A Resource Book for Teacher Educators, Level 1. 1. New Delhi: Centre for environment education, 2005.
Citace podle MLANCTE. Environmental Education: A Resource Book for Teacher Educators, Level 1. 1. Centre for environment education, 2005.
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