@book { NonverbaleKommunikation,
    title = "Nonverbale Kommunikation",
    author = "Alexandra {Köhler}",
    year = "2008",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783640185580",
    url = "https://www.hausarbeiten.de/document/116641"
}