Insert an Apostrophe in a formula

This is probably a really dumb question but im new to this. 
I'm trying to put in a code for VB to automatically insert a formula into a specific cell. 
My formula has an apostrophe in it because it refers to another workbook...

ActiveSheet.Range("B66").Formula = "=pull(" '"&mfpn&wsn&"'!"&ct)"

MFPN, WSN, and CT are all cell references, not variables. So basically I want that whole quote to be inserted into the cell.

Everything after the first apostrophe is converted into a comment...Is there a work around?

please help!!