@book { AcrossBorders,
    title = "Across Borders",
    subtitle = "Cultural and Linguistic Shifts in the 21st Century",
    author = "Ewa {Rusek} and Władysław {Witalisz}",
    year = "2020",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b17515",
    url = "https://www.peterlang.com/document/1063336"
}