APA (7th ed.) Citation

Killen, J. M. (1959). The sonic surface-wave transducer. [publisher not identified].

Chicago Style (17th ed.) Citation

Killen, John M. The Sonic Surface-wave Transducer. Minneapolis: [publisher not identified], 1959.

MLA (9th ed.) Citation

Killen, John M. The Sonic Surface-wave Transducer. [publisher not identified], 1959.

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