APA (7th ed.) Citation

Greenfield, G. G. (1968). Multivariable feedforward-feedback process control. [publisher not identified].

Chicago Style (17th ed.) Citation

Greenfield, Gaylord G. Multivariable Feedforward-feedback Process Control. [Place of publication not identified]: [publisher not identified], 1968.

MLA (9th ed.) Citation

Greenfield, Gaylord G. Multivariable Feedforward-feedback Process Control. [publisher not identified], 1968.