refer to pic below for Mariam's request to add her UNIMAS frens :)
Click FIND AND INVITE.
Then you will see SUGGESTIONS:PPL U KNOW ON G+.
Usually the ppl who have G+ account will appear there. If not, she can click add a new person and fill in the GMAIL add of the UNIMAS frens (whom most likely have G+ accounts)
By the way, she can see this pic cause I made it PUBLIC MODE :)