David, J., & David, K. The economic performance of Central Luzon (1987-1996).
芝加哥风格引文David, Josephine, 与 Karen David. The Economic Performance of Central Luzon (1987-1996).
MLA引文David, Josephine, 与 Karen David. The Economic Performance of Central Luzon (1987-1996).
警告：这些引文格式不一定是100％准确.