APA (7th ed.) Citation

Townsend, O. C. (1920). World trade in dental preparations: Peru. [publisher not identified].

Chicago Style (17th ed.) Citation

Townsend, O. C. World Trade in Dental Preparations: Peru. Washington, D.C.: [publisher not identified], 1920.

MLA (9th ed.) Citation

Townsend, O. C. World Trade in Dental Preparations: Peru. [publisher not identified], 1920.

Warning: These citations may not always be 100% accurate.