APA (7th ed.) Citation

Great Britain. Defence Works Services. (1994). Specification for specialist works on petroleum installations - mechanical / Defence Works Services. HMSO.

Chicago Style (17th ed.) Citation

Great Britain. Defence Works Services. Specification for Specialist Works on Petroleum Installations - Mechanical / Defence Works Services. London: HMSO, 1994.

MLA (9th ed.) Citation

Great Britain. Defence Works Services. Specification for Specialist Works on Petroleum Installations - Mechanical / Defence Works Services. HMSO, 1994.

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