@book { DrogenabhngigkeitUrsachenAuswirkungenTherapie,
    title = "Drogenabhängigkeit  - Ursachen / Auswirkungen / Therapie",
    author = "Christian {Ladda}",
    year = "2004",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783638302388",
    url = "https://www.hausarbeiten.de/document/28474"
}