@book { Unternehmenskulturundvision,
    title = "Unternehmenskultur und -vision",
    subtitle = "Herausgegeben von Harald Geißler",
    author = "Harald {Geißler}",
    year = "1991",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1079280"
}