@book { Sozialkompetenzfrdern,
    title = "Sozialkompetenz fördern",
    author = "Jörg {Leistenschneider}",
    year = "2007",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783638004565",
    url = "https://www.hausarbeiten.de/document/84042"
}