APA (7th ed.) Citation

Zimmerman, S. M., & Conrad, L. M. (1984). User's guide to the Epson HX-20. Hayden Book Co..

Chicago Style (17th ed.) Citation

Zimmerman, Steven M., and Leo M. Conrad. User's Guide to the Epson HX-20. Hasbrouck Heights, N.J.: Hayden Book Co., 1984.

MLA (9th ed.) Citation

Zimmerman, Steven M., and Leo M. Conrad. User's Guide to the Epson HX-20. Hayden Book Co., 1984.