To cross-reference between spreadsheets, you must identify cells using extended addresses. These extended references specify the cell's sheet as well as its column and row.

To pull data from another sheet in Excel, use cell references, use the VLOOKUP function, or use the INDEX and MATCH functions.

You can reference a list on another sheet, but it takes a bit more work. In this tutorial, I’ll show you how to populate a dropdown with data on another sheet.