Ocampo, K. R. DENR starts crackdown on illegal small-scale miners. IN Business. Philippine Daily Inquirer.
芝加哥风格引文Ocampo, Karl R. "DENR Starts Crackdown on Illegal Small-scale Miners. IN Business." Philippine Daily Inquirer .
MLA引文Ocampo, Karl R. "DENR Starts Crackdown on Illegal Small-scale Miners. IN Business." Philippine Daily Inquirer, .
警告：这些引文格式不一定是100％准确.