APA (7e ed.) Bronvermelding
Heide, L. (2009). Punched-Card Systems and the Early Information Explosion, 1880–1945. Johns Hopkins University Press.
Chicago (17e ed.) Bronvermelding
Heide, Lars. Punched-Card Systems and the Early Information Explosion, 1880–1945. Baltimore: Johns Hopkins University Press, 2009.
MLA (9e ed.) Bronvermelding
Heide, Lars. Punched-Card Systems and the Early Information Explosion, 1880–1945. Johns Hopkins University Press, 2009.
Let op: Deze citaties zijn niet altijd 100% accuraat.