United States. National Capital Park and Planning Commission. (1950). Open spaces and community services: A portion of the comprehensive plan for the national capital and its environs. The Commission.
Chicago Style (17th ed.) CitationUnited States. National Capital Park and Planning Commission. Open Spaces and Community Services: A Portion of the Comprehensive Plan for the National Capital and Its Environs. Washington: The Commission, 1950.
MLA引文United States. National Capital Park and Planning Commission. Open Spaces and Community Services: A Portion of the Comprehensive Plan for the National Capital and Its Environs. The Commission, 1950.
警告：這些引文格式不一定是100％准確.