APA (7th ed.) Citation

Frenzel, L. E., Jr. (1981). Digital counter handbook. H.W. Sams.

Chicago Style (17th ed.) Citation

Frenzel, Louis E., Jr. Digital Counter Handbook. Indianapolis, Ind.: H.W. Sams, 1981.

MLA (9th ed.) Citation

Frenzel, Louis E., Jr. Digital Counter Handbook. H.W. Sams, 1981.