APA (7th ed.) Citation

Cahn, R. E. (1929). Market for adding and calculating machines in Brazil. [publisher not identified].

Chicago Style (17th ed.) Citation

Cahn, Rudolf Edwin. Market for Adding and Calculating Machines in Brazil. Washington, D.C.: [publisher not identified], 1929.

MLA (9th ed.) Citation

Cahn, Rudolf Edwin. Market for Adding and Calculating Machines in Brazil. [publisher not identified], 1929.