APA (7th ed.) Citation

Higgins, J. C. (1985). Computer-based planning systems. E. Arnold.

Chicago Style (17th ed.) Citation

Higgins, J. C. Computer-based Planning Systems. London ; Baltimore, Md., USA: E. Arnold, 1985.

MLA (8th ed.) Citation

Higgins, J. C. Computer-based Planning Systems. E. Arnold, 1985.