Cita APA (7th ed.)
Helfrick, A. D. (2010). Principles of avionics (6th ed.). Avionics Communications, Inc..
Cita Chicago (17th ed.)
Helfrick, Albert D. Principles of Avionics. 6th ed. Leesburg, VA: Avionics Communications, Inc., 2010.
Cita MLA (9th ed.)
Helfrick, Albert D. Principles of Avionics. 6th ed. Avionics Communications, Inc., 2010.
Atenció: Aquestes cites poden no estar 100% correctes.