@book { ZeitgeistGenossen, title = "Zeitgeist-Genossen", subtitle = "Das Berliner Programm der SPD von 1989- Motive - Ziele - Folgen", author = "Wolfgang {Bok}", year = "1995", publisher = "Peter Lang Verlag", address = "Berlin, Germany", url = "https://www.peterlang.com/document/1115652" }