APA (7th ed.) Citation

Hartung, O. (2017). Schreiben. Friedrich.

Chicago Style (17th ed.) Citation

Hartung, Olaf. Schreiben. Seelze: Friedrich, 2017.

MLA (9th ed.) Citation

Hartung, Olaf. Schreiben. Friedrich, 2017.

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