APA (7th ed.) Citation

Koerner, J. L., & Friedrich, C. D. (1990). Caspar David Friedrich and the subject of landscape. Yale University Press.

Chicago Style (17th ed.) Citation

Koerner, Joseph Leo, and Caspar David Friedrich. Caspar David Friedrich and the Subject of Landscape. New Haven: Yale University Press, 1990.

MLA (9th ed.) Citation

Koerner, Joseph Leo, and Caspar David Friedrich. Caspar David Friedrich and the Subject of Landscape. Yale University Press, 1990.