APA (7th ed.) Citation

Grube, E. (2014). Brief an meinen Freund Hugo. Hugo Höllenreiner.

Chicago Style (17th ed.) Citation

Grube, Ernst. "Brief an Meinen Freund Hugo." Hugo Höllenreiner 2014.

MLA (8th ed.) Citation

Grube, Ernst. "Brief an Meinen Freund Hugo." Hugo Höllenreiner, 2014.

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