@book { AllgemeineDepressionsskalaundBeckDepressionInventar,
    title = "Allgemeine Depressionsskala und Beck Depression Inventar",
    author = "Stefanie  {Kowalczyk}",
    year = "2008",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783640104222",
    url = "https://www.hausarbeiten.de/document/112149"
}