@book { PositiveundnegativeHflichkeitinderInterimssprache,
    title = "Positive und negative Höflichkeit in der Interimssprache",
    author = "Christian {Schröter}",
    year = "2018",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b14231",
    url = "https://www.peterlang.com/document/1056194"
}