APA (7th ed.) Citation

Stock, W. J. (1988). Helmut Middendorf. Künstler.

Chicago Style (17th ed.) Citation

Stock, Wolfgang Jean. "Helmut Middendorf." Künstler 1988.

MLA (8th ed.) Citation

Stock, Wolfgang Jean. "Helmut Middendorf." Künstler, 1988.

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