330215 Helfrick, A. D. (1984). Modern aviation electronics. Englewood Cliffs, NJ : Prentice-Hall.
Cita Chicago (17th ed.)330215 Helfrick, Albert D. Modern Aviation Electronics. Englewood Cliffs, NJ : Prentice-Hall, 1984.
Cita MLA (9th ed.)330215 Helfrick, Albert D. Modern Aviation Electronics. Englewood Cliffs, NJ : Prentice-Hall, 1984.
Atenció: Aquestes cites poden no estar 100% correctes.