APA (7th ed.) Citation

Ottmann, K., & Penck, A. R. (1994). A. R. Penck.

Chicago Style (17th ed.) Citation

Ottmann, Klaus, and A. R. Penck. A. R. Penck. 1994.

MLA (9th ed.) Citation

Ottmann, Klaus, and A. R. Penck. A. R. Penck. 1994.

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