APA (7th ed.) Citation

Grogan, J. (1985). Microcomputer-based information feedback system for improving tractor efficiency. [publisher not identified].

Chicago Style (17th ed.) Citation

Grogan, Joseph. Microcomputer-based Information Feedback System for Improving Tractor Efficiency. [Place of publication not identified]: [publisher not identified], 1985.

MLA (9th ed.) Citation

Grogan, Joseph. Microcomputer-based Information Feedback System for Improving Tractor Efficiency. [publisher not identified], 1985.