@book { HitlerMotiveundMethodeneinerunwahrscheinlichenKarriere,
    title = "Hitler – Motive und Methoden einer unwahrscheinlichen Karriere",
    author = "Heinz {Schreckenberg}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1100123"
}