(1998). Davao City Water District: A pioneer in the water supply industry. Philippine Panorama.
芝加哥风格引文"Davao City Water District: A Pioneer in the Water Supply Industry." Philippine Panorama 1998.
MLA引文"Davao City Water District: A Pioneer in the Water Supply Industry." Philippine Panorama, 1998.
警告：这些引文格式不一定是100％准确.