APA (7th ed.) Zitazioa
Helfrick, A. (2000). Principles of Avionics (9th ed.). Avionics Communications Inc.
Chicago Style (17th ed.) Zitazioa
Helfrick, Albert. Principles of Avionics. 9th ed. United States of America: Avionics Communications Inc, 2000.
MLA (9th ed.) Zitazioa
Helfrick, Albert. Principles of Avionics. 9th ed. Avionics Communications Inc, 2000.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.