Learn to write DAX: a practical guide to learning Power Pivot for Excel and Power BI
Mastering Power BI: Build Business Intelligence Applications Powered with DAX Calculations, Insightful Visualizations, Advanced BI Techniques, and Loads of Data Sources (English Edition)
Mastering Power BI: Build Business Intelligence Applications Powered with DAX Calculations, Insightful Visualizations, Advanced BI Techniques, and Loads of Data Sources (English Edition)
Power Pivot and Power BI the Excel users guide to DAX Power Query, Power BI & Power Pivot in Excel 2010-2016