Cita APA (7a ed.)
Helfrick, A. (2004). Principles of Avionics (3rd ed.). Avionics Communications Inc.
Cita Chicago Style (17a ed.)
Helfrick, Albert. Principles of Avionics. 3rd ed. United States of America: Avionics Communications Inc, 2004.
Cita MLA (9a ed.)
Helfrick, Albert. Principles of Avionics. 3rd ed. Avionics Communications Inc, 2004.
Precaución: Estas citas no son 100% exactas.