Ammar I didn't use any specific books except for business admin. because it was my own subject. They were Fundamentals of HRM by Decenzo, Financial management by Brigham, Management by Stephen Robbins & principles of marketing by Kotler.
For Political science I downloaded some notes from this forum & except that I used to make my own notes keeping in view the trends in past papers & the syllabus.
For Indo Pak history I used these websites: historypak.com, storyofpakistan.com, anicentpakistan.info.
For Gender studies I just kept syllabus with me and made my notes using different websites and research articles.
Just be sure that you stick to the syllabus and do go through the past papers specifically the mcqs because most of the time they are repeated.