@book { ThoughtSelfLeadershipundMentalesTrainingfrdasManagement,
    title = "'Thought Self Leadership' und Mentales Training für das Management",
    author = "Albert {Griesmayr}",
    year = "2009",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783836627139",
    url = "https://m.diplom.de/document/226631"
}