Gatdula, L. S. (1999). Roy Alvarez says healing the environment starts with M.E. Philippine Daily Inquirer.
芝加哥风格引文Gatdula, Leah Salterio. "Roy Alvarez Says Healing the Environment Starts with M.E." Philippine Daily Inquirer 1999.
MLA引文Gatdula, Leah Salterio. "Roy Alvarez Says Healing the Environment Starts with M.E." Philippine Daily Inquirer, 1999.
警告：这些引文格式不一定是100％准确.