273861 Campbell, R. D. (1985). Ground training for the private pilot licence. Oxford : BSP Professional Books.
Chicago-referens (17:e uppl.)273861 Campbell, R. D. Ground Training for the Private Pilot Licence. Oxford : BSP Professional Books, 1985.
MLA-referens (9:e uppl.)273861 Campbell, R. D. Ground Training for the Private Pilot Licence. Oxford : BSP Professional Books, 1985.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.