APA (7th ed.) Citation

Horgan, M. O., & Roulston, F. R. (1989). The foundations of engineering contracts / M. O'C. Horgan and F.R. Roulston. Spon.

Chicago Style (17th ed.) Citation

Horgan, M. O'C., and F. R. Roulston. The Foundations of Engineering Contracts / M. O'C. Horgan and F.R. Roulston. London: Spon, 1989.

MLA (9th ed.) Citation

Horgan, M. O'C., and F. R. Roulston. The Foundations of Engineering Contracts / M. O'C. Horgan and F.R. Roulston. Spon, 1989.

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