APA (7th ed.) Citation

Gregorovius, F. (1889). Geschichte der Stadt Athen. [s.n.].

Chicago Style (17th ed.) Citation

Gregorovius, Ferdinand. Geschichte Der Stadt Athen. Stuttgart: [s.n.], 1889.

MLA (9th ed.) Citation

Gregorovius, Ferdinand. Geschichte Der Stadt Athen. [s.n.], 1889.

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