@book { PublicRelationsfrHandelsunternehmen,
    title = "Public Relations für Handelsunternehmen",
    author = "Vera {Sühling}",
    year = "2002",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832454685",
    url = "https://m.diplom.de/document/220782"
}