Linguaggio M Power Query

Holy Macro! Books

M Is for (Data) Monkey: A Guide to the M Language in Excel Power Query (English Edition)

Packt Publishing

The Definitive Guide to Power Query (M): Mastering complex data transformation with Power Query (English Edition)

Power Query M Language Basics (English Edition)  

BPB Publications

The Ultimate Power Query Cookbook for Power BI and Excel: Leveraging Power Query for collecting, combining and transforming your data (English Edition)