@book { DepressioneinSymptomdesBewutseinsseelenzeitalters,
    title = "Depression - ein Symptom des Bewußtseinsseelenzeitalters",
    author = "Nicole {Wessels}",
    year = "2007",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783836606332",
    url = "https://m.diplom.de/document/225425"
}