APA (7th ed.) Citation

Frick, H., & Siegfried, T. (1931). Zur systematischen Theologie. Klotz.

Chicago Style (17th ed.) Citation

Frick, Heinrich, and Theodor Siegfried. Zur Systematischen Theologie. Gotha: Klotz, 1931.

MLA (9th ed.) Citation

Frick, Heinrich, and Theodor Siegfried. Zur Systematischen Theologie. Klotz, 1931.

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