@book { EvangelikaleBewegungenundneueFreikirchen,
    title = "Evangelikale Bewegungen und neue Freikirchen",
    author = "Hella {Keller}",
    year = "2015",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    url = "https://m.diplom.de/document/312935"
}