APA

Transportation Research Board, National Research Council, . (1992). National aviation system planning symposium, July 11-13, 1991 in Minneapolis, Minnesota. Washington DC: Transportation Research Board.

Chicago

Transportation Research Board, National Research Council, . 1992. National aviation system planning symposium, July 11-13, 1991 in Minneapolis, Minnesota. Washington DC: Transportation Research Board.

Harvard

Transportation Research Board, National Research Council, . (1992). National aviation system planning symposium, July 11-13, 1991 in Minneapolis, Minnesota. Washington DC: Transportation Research Board.

MLA

Transportation Research Board, National Research Council, . National aviation system planning symposium, July 11-13, 1991 in Minneapolis, Minnesota. Washington DC: Transportation Research Board. 1992.