@book { 360FeedbackAnnherunganeinBestPracticeModel,
    title = "360°-Feedback - Annäherung an ein Best-Practice-Model",
    author = "Dirk {Kirschbaum}",
    year = "1999",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832419974",
    url = "https://m.diplom.de/document/217838"
}