APA (7th ed.) Citation

Scarborough, W. S. (1890). The race problem. [publisher not identified].

Chicago Style (17th ed.) Citation

Scarborough, W. S. The Race Problem. [Place of publication not identified]: [publisher not identified], 1890.

MLA (9th ed.) Citation

Scarborough, W. S. The Race Problem. [publisher not identified], 1890.