273861 Campbell, R. D. (1985). Ground training for the private pilot licence. Oxford : BSP Professional Books.
Cita Chicago (17th ed.)273861 Campbell, R. D. Ground Training for the Private Pilot Licence. Oxford : BSP Professional Books, 1985.
Cita MLA (9th ed.)273861 Campbell, R. D. Ground Training for the Private Pilot Licence. Oxford : BSP Professional Books, 1985.
Atenció: Aquestes cites poden no estar 100% correctes.