APA (7th ed.) Citation

Macke, A., & Macke, W. (1958). Aquarelle. Piper-Bücherei.

Chicago Style (17th ed.) Citation

Macke, August, and Wolfgang Macke. "Aquarelle." Piper-Bücherei 1958.

MLA (9th ed.) Citation

Macke, August, and Wolfgang Macke. "Aquarelle." Piper-Bücherei, 1958.

Warning: These citations may not always be 100% accurate.