APA (7th ed.) Citation

W, P. R. (1977). Audio system with enhanced spatial effect.

Chicago Style (17th ed.) Citation

W, PETERS; RICHARD. Audio System with Enhanced Spatial Effect. 1977.

MLA (9th ed.) Citation

W, PETERS; RICHARD. Audio System with Enhanced Spatial Effect. 1977.

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