APA Citation

Willett, P. (1988). Document retrieval systems. London: Taylor Graham and the Institute of Information Scientists.

Chicago Style Citation

Willett, Peter. Document Retrieval Systems. London: Taylor Graham and the Institute of Information Scientists, 1988.

MLA Citation

Willett, Peter. Document Retrieval Systems. London: Taylor Graham and the Institute of Information Scientists, 1988.

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