APA (7th ed.) Citation

Ravndal, G. B. (1928). Swiss market for coin controlled and coin handling machines. [publisher not identified].

Chicago Style (17th ed.) Citation

Ravndal, G. Bie. Swiss Market for Coin Controlled and Coin Handling Machines. Washington, D.C.: [publisher not identified], 1928.

MLA (9th ed.) Citation

Ravndal, G. Bie. Swiss Market for Coin Controlled and Coin Handling Machines. [publisher not identified], 1928.