Apel, H., & Camozzi, A. (1996). Adult environmental education: A handbook on context and methods. Institute for International Cooperation of the German Adult Education Association.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিApel, Heino, এবং Anne Camozzi. Adult Environmental Education: A Handbook on Context and Methods. Bonn: Institute for International Cooperation of the German Adult Education Association, 1996.
M.L.A (9 ম সংস্করণ) উদ্ধৃতিApel, Heino, এবং Anne Camozzi. Adult Environmental Education: A Handbook on Context and Methods. Institute for International Cooperation of the German Adult Education Association, 1996.
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