International Union for Conservation of Nature and Natural Resources & Saveland, R. N. (1976). Handbook of environmental education, with international case studies. J. Wiley.
Citace podle Chicago (17th ed.)International Union for Conservation of Nature and Natural Resources a Robert N. Saveland. Handbook of Environmental Education, with International Case Studies. London, New York: J. Wiley, 1976.
Citace podle MLA (9th ed.)International Union for Conservation of Nature and Natural Resources a Robert N. Saveland. Handbook of Environmental Education, with International Case Studies. J. Wiley, 1976.
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