@book { DieEntwicklungeineskologieorientiertenMarketingManagements,
    title = "Die Entwicklung eines ökologieorientierten Marketing Managements",
    author = "Fabian {Kirchmann}",
    year = "2001",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832434717",
    url = "https://m.diplom.de/document/219137"
}