APA (7th ed.) Citation

Knowles. (1994). Direct digital control systems. Research studies Press.

Chicago Style (17th ed.) Citation

Knowles. Direct Digital Control Systems. Taunton: Research studies Press, 1994.

MLA (9th ed.) Citation

Knowles. Direct Digital Control Systems. Research studies Press, 1994.

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