APA (7th ed.) Citation

Ritter, H. (1937). Immer erfreulich. https://doi.org/10.11588/diglit.10944.64

Chicago Style (17th ed.) Citation

Ritter, Heinrich. Immer Erfreulich. 1937. https://doi.org/10.11588/diglit.10944.64.

MLA (9th ed.) Citation

Ritter, Heinrich. Immer Erfreulich. 1937. https://doi.org/10.11588/diglit.10944.64.

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