APA (7th ed.) Citation

Beyer & Letcher. (1969). Physical ultrasonic. Academic Press.

Chicago Style (17th ed.) Citation

Beyer and Letcher. Physical Ultrasonic. New York: Academic Press, 1969.

MLA (8th ed.) Citation

Beyer and Letcher. Physical Ultrasonic. Academic Press, 1969.

Warning: These citations may not always be 100% accurate.