Trimble, W. F. (1982). High frontier: A history of aeronautics in Pennsylvania. Pittsburgh, Pa: University of Pittsburgh Press.
シカゴスタイル引用形Trimble, William F. High Frontier: A History of Aeronautics in Pennsylvania. Pittsburgh, Pa: University of Pittsburgh Press, 1982.
MLA引用形式Trimble, William F. High Frontier: A History of Aeronautics in Pennsylvania. Pittsburgh, Pa: University of Pittsburgh Press, 1982.
警告: この引用は必ずしも正確ではありません.