APA (7th ed.) Citation

Heimpel, H. (1962). Kaiser Friedrich Barbarossa. Vandenhoeck & Ruprecht.

Chicago Style (17th ed.) Citation

Heimpel, Hermann. Kaiser Friedrich Barbarossa. Göttingen: Vandenhoeck & Ruprecht, 1962.

MLA (9th ed.) Citation

Heimpel, Hermann. Kaiser Friedrich Barbarossa. Vandenhoeck & Ruprecht, 1962.

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