@book { CannabiskonsumAuswirkungenundRisiken,
    title = "Cannabiskonsum - Auswirkungen und Risiken",
    author = "Tina {von Berg}",
    year = "2006",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783638540759",
    url = "https://www.hausarbeiten.de/document/60377"
}