Spokane County Noxious Weed Control Board. (2015). Noxious weeds of Spokane County. Spokane County Noxious Weed Control Board.
Cita Chicago Style (17a ed.)Spokane County Noxious Weed Control Board. Noxious Weeds of Spokane County. Spokane, WA: Spokane County Noxious Weed Control Board, 2015.
Cita MLA (8a ed.)Spokane County Noxious Weed Control Board. Noxious Weeds of Spokane County. Spokane County Noxious Weed Control Board, 2015.
Precaución: Estas citas no son 100% exactas.