@book { DieUmsatzbesteuerunggemeinntzigerSportvereine,
    title = "Die Umsatzbesteuerung gemeinnütziger Sportvereine",
    author = "Kristina {Dudde}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1107963"
}