APA (7th ed.) Citation

Regena, C. (1983). Programmer's reference guide to the TI-99/4A. Compute! Publications.

Chicago Style (17th ed.) Citation

Regena, C. Programmer's Reference Guide to the TI-99/4A. Greensboro, N.C.: Compute! Publications, 1983.

MLA (9th ed.) Citation

Regena, C. Programmer's Reference Guide to the TI-99/4A. Compute! Publications, 1983.