@book { UrsachenFormenundRisikenmannmnnlicherProstitution,
    title = "Ursachen, Formen und Risiken mann-männlicher Prostitution",
    author = "Stephanie {Angenendt}",
    year = "2013",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783656424543",
    url = "https://www.hausarbeiten.de/document/214020"
}