APA (7th ed.) Citation

Hearnden, K. (1987). A Handbook of computer security. Kogan Page.

Chicago Style (17th ed.) Citation

Hearnden, Keith. A Handbook of Computer Security. London: Kogan Page, 1987.

MLA (9th ed.) Citation

Hearnden, Keith. A Handbook of Computer Security. Kogan Page, 1987.