@book { SchnerStreitenKonfliktelsenmitMediation,
    title = "Schöner Streiten: Konflikte lösen mit Mediation",
    author = "Sandra {Wagner}",
    year = "2005",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832488628",
    url = "https://m.diplom.de/document/224040"
}