APA (7th ed.) Citation

(1993). The open learning directory 1993. Pergamon Press Ltd.

Chicago Style (17th ed.) Citation

The Open Learning Directory 1993. Oxford: Pergamon Press Ltd, 1993.

MLA (9th ed.) Citation

The Open Learning Directory 1993. Pergamon Press Ltd, 1993.

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