APA (7th ed.) Citation

Boaz, W. (1927). Possibility for American ties in Colombia. [publisher not identified].

Chicago Style (17th ed.) Citation

Boaz, William. Possibility for American Ties in Colombia. Washington, D.C.: [publisher not identified], 1927.

MLA (9th ed.) Citation

Boaz, William. Possibility for American Ties in Colombia. [publisher not identified], 1927.