APA (7th ed.) Citation

Volkmann, A. (2017). Geographische Informationssysteme. Digital Humanities.

Chicago Style (17th ed.) Citation

Volkmann, Armin. "Geographische Informationssysteme." Digital Humanities 2017.

MLA (9th ed.) Citation

Volkmann, Armin. "Geographische Informationssysteme." Digital Humanities, 2017.

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