APA (7th ed.) Citation

Brown, W. D. (1929). World trade in veterinary preparations: Brazil. [publisher not identified].

Chicago Style (17th ed.) Citation

Brown, W. Duval. World Trade in Veterinary Preparations: Brazil. Washington, D.C.: [publisher not identified], 1929.

MLA (9th ed.) Citation

Brown, W. Duval. World Trade in Veterinary Preparations: Brazil. [publisher not identified], 1929.