APA (7th ed.) Citation

Schwarz, L. J. (1932). Cocoa in Sao Tome and Principe. U.S. Government Printing Office.

Chicago Style (17th ed.) Citation

Schwarz, Leonard J. Cocoa in Sao Tome and Principe. [Washington?]: U.S. Government Printing Office, 1932.

MLA (9th ed.) Citation

Schwarz, Leonard J. Cocoa in Sao Tome and Principe. U.S. Government Printing Office, 1932.