APA (7th ed.) Citation

Hartley, R. J. (1990). Online searching: Principles and practice. Bowker-Saur.

Chicago Style (17th ed.) Citation

Hartley, Richard J. Online Searching: Principles and Practice. London ; New York: Bowker-Saur, 1990.

MLA (9th ed.) Citation

Hartley, Richard J. Online Searching: Principles and Practice. Bowker-Saur, 1990.