APA aipamena

Kirchner, E. L., & Ketterer, R. N. (1991). Drawings and pastels. Alpine Fine Arts Collection.

Chicago Style aipamena

Kirchner, Ernst Ludwig, and Roman Norbert Ketterer. Drawings and Pastels. London: Alpine Fine Arts Collection, 1991.

MLA aipamena

Kirchner, Ernst Ludwig, and Roman Norbert Ketterer. Drawings and Pastels. Alpine Fine Arts Collection, 1991.