APA (7th ed.) Citation

Architects, 6. R. I. o. B. (1971). Conditions of engagement. London.

Chicago Style (17th ed.) Citation

Architects, 6682 Royal Institute of British. Conditions of Engagement. London, 1971.

MLA (9th ed.) Citation

Architects, 6682 Royal Institute of British. Conditions of Engagement. London, 1971.