APA (7th ed.) Citation

Mackay, E. B. (1986). Proprietary trench support systems. Construction Industry Research and Information Association.

Chicago Style (17th ed.) Citation

Mackay, E. B. Proprietary Trench Support Systems. London: Construction Industry Research and Information Association, 1986.

MLA (9th ed.) Citation

Mackay, E. B. Proprietary Trench Support Systems. Construction Industry Research and Information Association, 1986.

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