APA (7th ed.) Citation

Stafford, M. L. (1928). Spain as market for bookkeeping, calculating, adding, and billing machines. [publisher not identified].

Chicago Style (17th ed.) Citation

Stafford, Maurice L. Spain as Market for Bookkeeping, Calculating, Adding, and Billing Machines. Washington, D.C.: [publisher not identified], 1928.

MLA (9th ed.) Citation

Stafford, Maurice L. Spain as Market for Bookkeeping, Calculating, Adding, and Billing Machines. [publisher not identified], 1928.