@book { QualitativeForschungundihreGtekriterien,
    title = "Qualitative Forschung und ihre Gütekriterien",
    author = "Pinar {Kehribar Yorulmaz}",
    year = "2014",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    url = "https://www.hausarbeiten.de/document/272485"
}