@book { AdolfvonHarnackDasWesendesChristentums,
    title = "Adolf von Harnack- «Das Wesen des Christentums»",
    author = " {Sung-Wook Kim}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1096240"
}