APA (7th ed.) Citation

Helfrick, A. D. (2000). Principles of avionics (1. ed.). Avionics Communications.

Chicago Style (17th ed.) Citation

Helfrick, Albert D. Principles of Avionics. 1. ed. Leesburg, VA: Avionics Communications, 2000.

MLA (9th ed.) Citation

Helfrick, Albert D. Principles of Avionics. 1. ed. Avionics Communications, 2000.