combining formulas in a cell and concatenate

I am trying to combine this formula with another formula but I cant get it right.
I have multiple worksheets that feed into 1 so I am using this formula to pull in the info
=II.MissionCritical!C20. This info is a title like "Writing".
=II.MissionCritical!C23. This info is a yes or no.
So I need the =II.MissionCritical!C20 formula to also say if c23 is no add an *** to the front of the title. so the title would look like "***Writing". and if C23 is yes leave the title as is.

Can you help me to find a formula to do this?

Thanks!!
Michelle