@book { ProstitutionUrsachenundSituationinDeutschland,
    title = "Prostitution - Ursachen und Situation in Deutschland",
    author = "Hendrik {Bartos}",
    year = "2013",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783656368045",
    url = "https://www.hausarbeiten.de/document/208280"
}