@book { NachhaltigeUnternehmensfhrung,
    title = "Nachhaltige Unternehmensführung",
    author = "Timo {Weber}",
    year = "2012",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783656156291",
    url = "https://www.hausarbeiten.de/document/191053"
}