APA (7th ed.) Citation

POWELL, L. (1974). A guide to the overhead projector. British Association.

Chicago Style (17th ed.) Citation

POWELL, Len. A Guide to the Overhead Projector. London: British Association, 1974.

MLA (8th ed.) Citation

POWELL, Len. A Guide to the Overhead Projector. British Association, 1974.

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