@book { BrunoBettelheim,
    title = "Bruno Bettelheim",
    author = "Anna {Biedermann}",
    year = "2006",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783640079292",
    url = "https://www.hausarbeiten.de/document/109751"
}