Gray, D. (1973). Reflections on the recreation and park movement: A book of readings. W.M.C. Brown.
Citace podle Chicago (17th ed.)Gray, David. Reflections on the Recreation and Park Movement: A Book of Readings. David Gray: W.M.C. Brown, 1973.
Citace podle MLA (9th ed.)Gray, David. Reflections on the Recreation and Park Movement: A Book of Readings. W.M.C. Brown, 1973.
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