@book { PolitenessTheoreticalapproachesandlanguagepracticeBrownandLevinsonreviewed,
    title = "Politeness: Theoretical approaches and language practice - Brown and Levinson reviewed",
    author = "Hanno {Frey}",
    year = "2003",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783638184588",
    url = "https://www.hausarbeiten.de/document/12618"
}