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