APA-viite (7. p.)
Ayala, C. J., & Bernabe, R. (2007). Puerto Rico in the American century: A history since 1898. University of North Carolina Press.
Chicago-viite (17. p.)
Ayala, César J., ja Rafael Bernabe. Puerto Rico in the American Century: A History Since 1898. Chapel Hill: University of North Carolina Press, 2007.
MLA-viite (9. p.)
Ayala, César J., ja Rafael Bernabe. Puerto Rico in the American Century: A History Since 1898. University of North Carolina Press, 2007.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.