Costales, A. C. (1997). The state of rural road infrastructure in the Philippines. Center for Policy and Development Studies, University of the Philippines at Los Baños.
芝加哥风格引文Costales, Achilles C. The State of Rural Road Infrastructure in the Philippines. College, Laguna: Center for Policy and Development Studies, University of the Philippines at Los Baños, 1997.
MLA引文Costales, Achilles C. The State of Rural Road Infrastructure in the Philippines. Center for Policy and Development Studies, University of the Philippines at Los Baños, 1997.
警告：这些引文格式不一定是100％准确.