Is there a way to reference or call code from one workbook to another?

Example

Workbook1 had a module called Mod1 and a sub called Sub1
Workbook2 had a module called Mod2 and a sub called Sub2


Can sub1 call sub2

Sub CallAcrossWorkbooks()
Call workbooks(€œBook2€�).modules(€œMod2€�).Procedu re(€œSub2€�)

End Sub

Thanks in advance,

Stewart