@book { UmgangmitPubertierendeninderSchule,
    title = "Umgang mit Pubertierenden in der Schule",
    author = "Dajana {Geffken}",
    year = "2011",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783656080596",
    url = "https://www.hausarbeiten.de/document/183679"
}