APA (7th ed.) Citation

Fraenkel, E. (1942). "Aliens of enemy nationalities". [S.n.].

Chicago Style (17th ed.) Citation

Fraenkel, Ernst. "Aliens of Enemy Nationalities". New York, N.Y: [S.n.], 1942.

MLA (8th ed.) Citation

Fraenkel, Ernst. "Aliens of Enemy Nationalities". [S.n.], 1942.