Citazione Stile APA (7a Edizione)

Varner, W. W. (1957). Computing with desk calculators. Rinehart.

Citazione stile Chigago Style (17a edizione)

Varner, Walter W. Computing with Desk Calculators. New York: Rinehart, 1957.

Citatione MLA (9a ed.)

Varner, Walter W. Computing with Desk Calculators. Rinehart, 1957.