@book { WerbeagenturenimMediamarktundallokativeEffizienz,
    title = "Werbeagenturen im Mediamarkt und allokative Effizienz",
    author = "Nicolas W. {Bogs}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1092157"
}