@book { TheGermanLanguageinSwitzerland,
    title = "The German Language in Switzerland",
    subtitle = "Multilingualism, Diglossia and Variation",
    author = "Felicity {Rash}",
    year = "1998",
    publisher = "Peter Lang Verlag",
    address = "Oxford, United Kingdom",
    url = "https://www.peterlang.com/document/1087570"
}