A programmed introduction to number systems /
[by] Irving Drooyan [and] Walter Hadel.
APA Citation
Drooyan, I., Hadel, W. (1964). A programmed introduction to number systems. New York: Wiley.
MLA Citation
Drooyan, Irving, and Walter Hadel. A Programmed Introduction to Number Systems. New York: Wiley, 1964.
Warning: These citations may not always be complete (especially for serials).