APA (7th ed.) Citation

Sommerfeld, W., & Weig, H. Die lustigen Drei.

Chicago Style (17th ed.) Citation

Sommerfeld, Walter, and H. Weig. Die Lustigen Drei.

MLA (9th ed.) Citation

Sommerfeld, Walter, and H. Weig. Die Lustigen Drei.

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