APA (7th ed.) Citation

Ronald, K., & Nicholls, P. (1992). Environmental Information Sources--Online and Ondisc.

Chicago Style (17th ed.) Citation

Ronald, Karen, and Paul Nicholls. Environmental Information Sources--Online and Ondisc. 1992.

MLA (9th ed.) Citation

Ronald, Karen, and Paul Nicholls. Environmental Information Sources--Online and Ondisc. 1992.

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