APA (7th ed.) Citation

Droysen, J. G. (2015). Outline of the principles of history: = Grundriss der Historik. Forgotten Books.

Chicago Style (17th ed.) Citation

Droysen, Johann Gustav. Outline of the Principles of History: = Grundriss Der Historik. London: Forgotten Books, 2015.

MLA (9th ed.) Citation

Droysen, Johann Gustav. Outline of the Principles of History: = Grundriss Der Historik. Forgotten Books, 2015.

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