Kaplan, R., & Kaplan, S. (1989). The Experience of nature: A psychological perspective. Cambridge University Press.
Lua i Stíl Chicago (17ú heag.)Kaplan, Rachel, agus Stephen Kaplan. The Experience of Nature: A Psychological Perspective. New York: Cambridge University Press, 1989.
Lua MLA (9ú heag.)Kaplan, Rachel, agus Stephen Kaplan. The Experience of Nature: A Psychological Perspective. Cambridge University Press, 1989.
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