APA (7th ed.) Citation

POWELL, L. (1961). A guide to the use of visual aids. British Association for Commercial and Industrial Education.

Chicago Style (17th ed.) Citation

POWELL, L.S. A Guide to the Use of Visual Aids. London: British Association for Commercial and Industrial Education, 1961.

MLA (8th ed.) Citation

POWELL, L.S. A Guide to the Use of Visual Aids. British Association for Commercial and Industrial Education, 1961.

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