APA (7th ed.) Zitazioa
Koerner, J. L. (2009). Caspar David Friedrich and the subject of landscape (2nd ed.). Reaktion.
Chicago Style (17th ed.) Zitazioa
Koerner, Joseph Leo. Caspar David Friedrich and the Subject of Landscape. 2nd ed. London: Reaktion, 2009.
MLA (9th ed.) Zitazioa
Koerner, Joseph Leo. Caspar David Friedrich and the Subject of Landscape. 2nd ed. Reaktion, 2009.
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