Elle, B. J. (1968). Issues and prospects in interurban air transport: A study of socio-economic, geographic and technical aspects of the development of air travel. Almqvist & Wiksell.
Chicago-Zitierstil (17. Ausg.)Elle, Björn J. Issues and Prospects in Interurban Air Transport: A Study of Socio-economic, Geographic and Technical Aspects of the Development of Air Travel. Stockholm: Almqvist & Wiksell, 1968.
MLA-Zitierstil (9. Ausg.)Elle, Björn J. Issues and Prospects in Interurban Air Transport: A Study of Socio-economic, Geographic and Technical Aspects of the Development of Air Travel. Almqvist & Wiksell, 1968.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.