APA (7th ed.) Citation

Spencer, D. F. (1927). World trade in coal tar dyes, food coloring: Japan. [publisher not identified].

Chicago Style (17th ed.) Citation

Spencer, D. F. World Trade in Coal Tar Dyes, Food Coloring: Japan. Washington, D.C.: [publisher not identified], 1927.

MLA (9th ed.) Citation

Spencer, D. F. World Trade in Coal Tar Dyes, Food Coloring: Japan. [publisher not identified], 1927.