APA (7th ed.) Citation

Gawthrop, P., Gawthrop, P. J., & Clarke, D. (1977). Studies in identification and control.

Chicago Style (17th ed.) Citation

Gawthrop, P., Peter J. Gawthrop, and D. Clarke. Studies in Identification and Control. 1977.

MLA (9th ed.) Citation

Gawthrop, P., et al. Studies in Identification and Control. 1977.