APA (7th ed.) Citation

Wien, A. (1912). Caroline von Humboldt. Velhagen & Klasing.

Chicago Style (17th ed.) Citation

Wien, Alfred. Caroline Von Humboldt. Bielefeld [Austria]: Velhagen & Klasing, 1912.

MLA (8th ed.) Citation

Wien, Alfred. Caroline Von Humboldt. Velhagen & Klasing, 1912.

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