International Union for Conservation of Nature and Natural Resources & Saveland, R. N. (1976). Handbook of environmental education, with international case studies. J. Wiley.
Chicago Style aipamenaInternational Union for Conservation of Nature and Natural Resources and Robert N. Saveland. Handbook of Environmental Education, with International Case Studies. London, New York: J. Wiley, 1976.
MLA aipamenaInternational Union for Conservation of Nature and Natural Resources and Robert N. Saveland. Handbook of Environmental Education, with International Case Studies. J. Wiley, 1976.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.