@book { UntersuchungenzurSpracheimFremdenverkehr,
    title = "Untersuchungen zur Sprache im Fremdenverkehr",
    author = "Anna Monika {Putschögl-Wild}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1070340"
}