APA (7th ed.) Citation

Cunningham, C. H., Houghton, M. T., Mills, S. T., & Wainwright, J. T. (1930). Market for coin operated scales on west coast of South America. [publisher not identified].

Chicago Style (17th ed.) Citation

Cunningham, Charles Henry, Milton T. Houghton, S. T. Mills, and J. T. Wainwright. Market for Coin Operated Scales on West Coast of South America. Washington, D.C.: [publisher not identified], 1930.

MLA (9th ed.) Citation

Cunningham, Charles Henry, et al. Market for Coin Operated Scales on West Coast of South America. [publisher not identified], 1930.