Citazione Stile APA (7a Edizione)

Heyel, C. (1969). Computers, office machines, and the new information technology. Collier-Macmillan.

Citazione stile Chigago Style (17a edizione)

Heyel, Carl. Computers, Office Machines, and the New Information Technology. London: Collier-Macmillan, 1969.

Citatione MLA (9a ed.)

Heyel, Carl. Computers, Office Machines, and the New Information Technology. Collier-Macmillan, 1969.