APA (7th ed.) Citation

Keyser, E. (1920). Danzig. [s.n.].

Chicago Style (17th ed.) Citation

Keyser, Erich. Danzig. Danzig: [s.n.], 1920.

MLA (9th ed.) Citation

Keyser, Erich. Danzig. [s.n.], 1920.

Warning: These citations may not always be 100% accurate.