@book { NonnativeSpeech,
    title = "Non-native Speech",
    author = "Ulrike {Gut}",
    year = "2012",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-01155-5",
    url = "https://www.peterlang.com/document/1054123"
}