APA (7th ed.) Citation

Ziegler, W. (2008). Herzog Friedrich III. von Schwaben (1147-1152).

Chicago Style (17th ed.) Citation

Ziegler, Wolfram. Herzog Friedrich III. Von Schwaben (1147-1152). 2008.

MLA (9th ed.) Citation

Ziegler, Wolfram. Herzog Friedrich III. Von Schwaben (1147-1152). 2008.

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