National Recreation and Park Association (U.S.) & Lancaster, R. A. (1983). Recreation, park and open space standards and guidelines. National Recreation and Park Association.
Citace podle Chicago (17th ed.)National Recreation and Park Association (U.S.) a Roger A. Lancaster. Recreation, Park and Open Space Standards and Guidelines. Alexandria, Va.: National Recreation and Park Association, 1983.
Citace podle MLA (8th ed.)National Recreation and Park Association (U.S.) a Roger A. Lancaster. Recreation, Park and Open Space Standards and Guidelines. National Recreation and Park Association, 1983.
Upozornění: Tyto citace jsou generovány automaticky. Nemusí být zcela správně podle citačních pravidel..