Lopez, H. E. (1999). At the helm of U.P: Presidential accents. Office of the Secretary of the University, University of the Philippines System.
芝加哥风格引文Lopez, Helen E. At the Helm of U.P: Presidential Accents. Quezon City: Office of the Secretary of the University, University of the Philippines System, 1999.
MLA引文Lopez, Helen E. At the Helm of U.P: Presidential Accents. Office of the Secretary of the University, University of the Philippines System, 1999.
警告：这些引文格式不一定是100％准确.