APA (7th ed.) Citation

Gengnagel, T., & Saeng, L. (1921). Aus Der Bücherei Ludwig Saeng.

Chicago Style (17th ed.) Citation

Gengnagel, Theodor, and Ludwig Saeng. Aus Der Bücherei Ludwig Saeng. Darmstadt, 1921.

MLA (9th ed.) Citation

Gengnagel, Theodor, and Ludwig Saeng. Aus Der Bücherei Ludwig Saeng. 1921.

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