APA (7th ed.) Citation

Helms, H. L. (1980). Computer language reference guide, with keyword dictionary. H.W. Sams.

Chicago Style (17th ed.) Citation

Helms, Harry L. Computer Language Reference Guide, with Keyword Dictionary. Indianapolis, Ind.: H.W. Sams, 1980.

MLA (8th ed.) Citation

Helms, Harry L. Computer Language Reference Guide, with Keyword Dictionary. H.W. Sams, 1980.

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