How to retrieve WHO information in Oracle custom form - r12

Hello,

We have  a custom form that is based on a Standard Table called Per_All_People_F.  When we click on Help>>About this record, we get following.

We need to enable the record history functionality where it needs to fetch same record history that is stored in Per_All_people_f tabl containing standard WHO columns.

Which API should I use to fetch WHO information stored in data base in per_all_people_f and display under "Record history" menu item and how do I achieve it?  This is on r12.1.3

Thank you

Darsh