Ayala, C. J., & Bernabe, R. (2007). Puerto Rico in the American century: A history since 1898. University of North Carolina Press.
芝加哥风格引文Ayala, César J., 与 Rafael Bernabe. Puerto Rico in the American Century: A History Since 1898. Chapel Hill: University of North Carolina Press, 2007.
MLA引文Ayala, César J., 与 Rafael Bernabe. Puerto Rico in the American Century: A History Since 1898. University of North Carolina Press, 2007.
警告：这些引文格式不一定是100％准确.