National Research Council (U.S.). Transportation Research Board. (1987). Air transportation issues. Transportation Research Board, National Research Council.
Chicago-viite (17. p.)National Research Council (U.S.). Transportation Research Board. Air Transportation Issues. Washington, D.C: Transportation Research Board, National Research Council, 1987.
MLA-viite (9. p.)National Research Council (U.S.). Transportation Research Board. Air Transportation Issues. Transportation Research Board, National Research Council, 1987.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.