Παραπομπή APA

Holroyd G. (1968). Computer based information retrieval systems. Clive Bingley.

Παραπομπή Chicago Style

Holroyd G. Computer Based Information Retrieval Systems. London: Clive Bingley, 1968.

Παραπομπή MLA

Holroyd G. Computer Based Information Retrieval Systems. Clive Bingley, 1968.