APA引文

Washington (State). Department of Highways. (1960). Historical markers. s.n..

Chicago Style (17th ed.) Citation

Washington (State). Department of Highways. Historical Markers. [Washington (State): s.n., 1960.

MLA引文

Washington (State). Department of Highways. Historical Markers. s.n., 1960.

警告：這些引文格式不一定是100％准確.