Cita APA (7th ed.)

Wilcox, G. W., & Butler, C. H. (1962). Industrial calculating devices. Holt.

Cita Chicago (17th ed.)

Wilcox, Glade W., i Charles H. Butler. Industrial Calculating Devices. [New York]: Holt, 1962.

Cita MLA (9th ed.)

Wilcox, Glade W., i Charles H. Butler. Industrial Calculating Devices. Holt, 1962.