@book { PracticalGuideforDataAnalysisUsingRTool,
    title = "Practical Guide for Data Analysis Using R Tool",
    author = "Antoine {Niyungeko}",
    year = "2021",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    url = "https://www.hausarbeiten.de/document/1010252"
}