National Recreation and Park Association (U.S.) & Lancaster, R. A. (1983). Recreation, park and open space standards and guidelines. National Recreation and Park Association.
Chicagoスタイル(17版)引用形式National Recreation and Park Association (U.S.) , Roger A. Lancaster. Recreation, Park and Open Space Standards and Guidelines. Alexandria, Va.: National Recreation and Park Association, 1983.
MLA(8版)引用形式National Recreation and Park Association (U.S.) , Roger A. Lancaster. Recreation, Park and Open Space Standards and Guidelines. National Recreation and Park Association, 1983.
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