@book { KarlBarthontheChristianLife,
    title = "Karl Barth on the Christian Life",
    subtitle = "The Practical Knowledge of God",
    author = "Joseph L. {Mangina}",
    year = "2001",
    publisher = "Peter Lang Verlag",
    address = "New York, United States of America",
    url = "https://www.peterlang.com/document/1092735"
}