@book { ErfolgsfaktorImmobilienmarketing,
    title = "Erfolgsfaktor Immobilienmarketing",
    subtitle = "Eine Zusatzqualifikation für Architekten",
    author = "Sophie {Bruss} and Sandra {Quade}",
    year = "2008",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783836617277",
    url = "https://m.diplom.de/document/226032"
}