@book { WaskannBeratungleisten,
    title = "Was kann Beratung leisten?",
    author = "Robert {Aloys}",
    year = "2008",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783836619677",
    url = "https://m.diplom.de/document/226166"
}