APA (7th ed.) Zitazioa
Helfrick, A. D. (2010). Principles of avionics (6th ed.). Avionics Communications, Inc..
Chicago Style (17th ed.) Zitazioa
Helfrick, Albert D. Principles of Avionics. 6th ed. Leesburg, VA: Avionics Communications, Inc., 2010.
MLA (9th ed.) Zitazioa
Helfrick, Albert D. Principles of Avionics. 6th ed. Avionics Communications, Inc., 2010.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.