Washington State Planning Council & United States. National Park Service. (1939). A study of parks, parkways and recreational areas, state of Washington.
Cita Chicago Style (17a ed.)Washington State Planning Council y United States. National Park Service. A Study of Parks, Parkways and Recreational Areas, State of Washington. [Olympia], 1939.
Cita MLA (8a ed.)Washington State Planning Council y United States. National Park Service. A Study of Parks, Parkways and Recreational Areas, State of Washington. 1939.
Precaución: Estas citas no son 100% exactas.