"Republic Act No. 9237; An Act Establishing Mount Apo Located in the Municipalities of Magpet and Makilala and City of Kidapawan, Province of Cotabato, in the Municipalities of Bansalan and Sta.
Truy cập ngày 8 tháng 4 năm 2016.  ^ “Republic Act No. 9237; An Act Establishing Mount Apo Located in the Municipalities of Magpet and Makilala and City of Kidapawan, Province of Cotabato, in the Municipalities of Bansalan and Sta.