APA-ийн эшлэл(7 дахь хэвлэлт)

Ayala, C. J., & Bernabe, R. (2007). Puerto Rico in the American century: A history since 1898. University of North Carolina Press.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

Ayala, César J., ба Rafael Bernabe. Puerto Rico in the American Century: A History Since 1898. Chapel Hill: University of North Carolina Press, 2007.

MLA -ийн эшлэл (9 дэх хэвлэлт)

Ayala, César J., ба Rafael Bernabe. Puerto Rico in the American Century: A History Since 1898. University of North Carolina Press, 2007.