@book { DieArbeitsgemeinschaftinderBauwirtschaft,
    title = "Die Arbeitsgemeinschaft in der Bauwirtschaft",
    author = "Dirk {Weitze}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1094342"
}