APA (7th ed.) Citation

Pico, R. (1950). The geographic regions of Puerto Rico. University of Puerto Rico Press.

Chicago Style (17th ed.) Citation

Pico, Rafael. The Geographic Regions of Puerto Rico. Rio Piedras: University of Puerto Rico Press, 1950.

MLA (9th ed.) Citation

Pico, Rafael. The Geographic Regions of Puerto Rico. University of Puerto Rico Press, 1950.

Warning: These citations may not always be 100% accurate.