Hi Shwetha,
Thanks for the reply and for your information.
We have this standard behavior in Activities,while creating Activity ,if you take sales agreement as a reference ,then we can see the same in Transaction History AB.
and you mentioned one path, there we can maintain object relationship profiles only and this profile should add in transaction type definition with the filed "Obj. Ref Prof." In this Obj ref profile we should maintain the list of transaction types which you want to display in the "Reference" field drop down box.
Regards,
Kiran