@book { QualitativeandquantitativeresearchmethodsAcomparisonusingtheexampleofthesurvey,
    title = "Qualitative and quantitative research methods. A comparison using the example of the survey",
    author = "Sandra {Schubert}",
    year = "2022",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    url = "https://m.hausarbeiten.de/document/1235645"
}