Παραπομπή APA

Lancaster, R. (1983). Recreation, park and open space standards and guidelines. National Recreation and Park Association.

Παραπομπή Chicago Style

Lancaster, R. Recreation, Park and Open Space Standards and Guidelines. National Recreation and Park Association, 1983.

Παραπομπή MLA

Lancaster, R. Recreation, Park and Open Space Standards and Guidelines. National Recreation and Park Association, 1983.

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