APA citiranje

Trimble, W. F. (1982). High frontier: A history of aeronautics in Pennsylvania. Pittsburgh, Pa: University of Pittsburgh Press.

Trích dẫn kiểu Chicago

Trimble, William F. High Frontier: A History of Aeronautics in Pennsylvania. Pittsburgh, Pa: University of Pittsburgh Press, 1982.

MLA citiranje

Trimble, William F. High Frontier: A History of Aeronautics in Pennsylvania. Pittsburgh, Pa: University of Pittsburgh Press, 1982.