@book { Philosophyofleadershipinintegratedmanagementsystems,
    title = "Philosophy of leadership in integrated management systems",
    author = "Wolfram {Klussmann}",
    year = "2009",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783836627047",
    url = "https://m.diplom.de/document/226624"
}