@book { ReputationManagementinSmallandMediumsizedEnterprises,
    title = "Reputation Management in Small and Medium-sized Enterprises",
    author = "Robert {Burkhardt}",
    year = "2008",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783836608251",
    url = "https://m.diplom.de/document/228993"
}