APA (7th ed.) Citation

Koerner, J. l., & Friedrich, C. D. (1990). Casper David Friedrich and the subject of landscape. Reaktion Books.

Chicago Style (17th ed.) Citation

Koerner, Joseph leo, and Caspar David Friedrich. Casper David Friedrich and the Subject of Landscape. London: Reaktion Books, 1990.

MLA (9th ed.) Citation

Koerner, Joseph leo, and Caspar David Friedrich. Casper David Friedrich and the Subject of Landscape. Reaktion Books, 1990.

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