International Transport Workers' Federation (ITF). (1999). Panorama ITF de l'aviation civile 1999. Bruxelles: ITF.
芝加哥风格引文International Transport Workers' Federation (ITF). Panorama ITF De L'aviation Civile 1999. Bruxelles: ITF, 1999.
MLA引文International Transport Workers' Federation (ITF). Panorama ITF De L'aviation Civile 1999. Bruxelles: ITF, 1999.
警告：这些引文格式不一定是100％准确.