APA (7th ed.) Citation

Helms, H. L. (1981). Computer language reference guide: With keyword dictionary. Howard W. Sams.

Chicago Style (17th ed.) Citation

Helms, Harry L. Computer Language Reference Guide: With Keyword Dictionary. Indianapolis: Howard W. Sams, 1981.

MLA (9th ed.) Citation

Helms, Harry L. Computer Language Reference Guide: With Keyword Dictionary. Howard W. Sams, 1981.

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