Lua APA (7ú heag.)

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

Lua i Stíl Chicago (17ú heag.)

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

Lua MLA (9ú heag.)

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

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