WELLS, A. T. (1984). Air Transportation Management Perspective Alexander T. Wells. Wodsworth.
Lua i Stíl Chicago (17ú heag.)WELLS, Alexander T. Air Transportation Management Perspective Alexander T. Wells. Wodsworth, 1984.
Lua MLA (8ú heag.)WELLS, Alexander T. Air Transportation Management Perspective Alexander T. Wells. Wodsworth, 1984.
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