Truesdell, L. E. (1965). The development of punch card tabulation in the Bureau of the Census: 1890 - 1940 ; with outlines of actual tabulation programs. US Dept. of Commerce, Bureau of the Census.
Chicago-Zitierstil (17. Ausg.)Truesdell, Leon Edgar. The Development of Punch Card Tabulation in the Bureau of the Census: 1890 - 1940 ; with Outlines of Actual Tabulation Programs. Washington, DC: US Dept. of Commerce, Bureau of the Census, 1965.
MLA-Zitierstil (9. Ausg.)Truesdell, Leon Edgar. The Development of Punch Card Tabulation in the Bureau of the Census: 1890 - 1940 ; with Outlines of Actual Tabulation Programs. US Dept. of Commerce, Bureau of the Census, 1965.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.