APA (7th ed.) Citation

Kähler, H. (1991). Der Friedrichshagener Kreis. Bauwelt.

Chicago Style (17th ed.) Citation

Kähler, Hermann. "Der Friedrichshagener Kreis." Bauwelt 1991.

MLA (8th ed.) Citation

Kähler, Hermann. "Der Friedrichshagener Kreis." Bauwelt, 1991.

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