1. http://www.ziddu.com/download/21381215/Bab1Aspek.pdf.html
2. http://www.ziddu.com/download/21381214/400xDasar2Planning.pdf.html
3. http://www.ziddu.com/download/21381213/600SchedulingMingguanHarian_ext1.pdf.html
4. http://www.ziddu.com/download/21381118/080CASE-STUDY.pdf.html