APA (7th ed.) Citation
EWERT, D., & ET AL. (1991). QUADRAVOC: AN APPARATUS FOR AUDIO RECORDING OF SPEECH AND VOICE.
Chicago Style (17th ed.) Citation
EWERT, D.H, and ET AL. QUADRAVOC: AN APPARATUS FOR AUDIO RECORDING OF SPEECH AND VOICE. 1991.
MLA (9th ed.) Citation
EWERT, D.H, and ET AL. QUADRAVOC: AN APPARATUS FOR AUDIO RECORDING OF SPEECH AND VOICE. 1991.
Warning: These citations may not always be 100% accurate.