Cita APA (7th ed.)

(1993). Karin Kneffel: Aquarelle ; (1992 - 93). Galerie Sophia Ungers.

Cita Chicago (17th ed.)

Karin Kneffel: Aquarelle ; (1992 - 93). Köln: Galerie Sophia Ungers, 1993.

Cita MLA (8th ed.)

Karin Kneffel: Aquarelle ; (1992 - 93). Galerie Sophia Ungers, 1993.