APA-ийн эшлэл(7 дахь хэвлэлт)

Heide, L. (2009). Punched-Card Systems and the Early Information Explosion, 1880–1945. Johns Hopkins University Press.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

Heide, Lars. Punched-Card Systems and the Early Information Explosion, 1880–1945. Baltimore: Johns Hopkins University Press, 2009.

MLA -ийн эшлэл (9 дэх хэвлэлт)

Heide, Lars. Punched-Card Systems and the Early Information Explosion, 1880–1945. Johns Hopkins University Press, 2009.