@book { DasSparundInvestitionsverhaltendertrkischenGastarbeiter,
    title = "Das Spar- und Investitionsverhalten der türkischen Gastarbeiter",
    author = "Artug {Cetin}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1099640"
}