APA (7th ed.) Citation

Hille, P. (1921). Briefe Peter Hilles an Else Lasker-Schüler.

Chicago Style (17th ed.) Citation

Hille, Peter. Briefe Peter Hilles an Else Lasker-Schüler. Berlin, 1921.

MLA (8th ed.) Citation

Hille, Peter. Briefe Peter Hilles an Else Lasker-Schüler. 1921.

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