@book { SailingontheNextTide,
    title = "Sailing on the Next Tide",
    subtitle = "Missions, Missiology, and the Third Reich",
    author = "Werner {Ustorf}",
    year = "2000",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1091530"
}