APA (7th ed.) Citation

Picó, R. (1950). The geographic regions of Puerto Rico. Univ. of Puerto Rico Press.

Chicago Style (17th ed.) Citation

Picó, Rafael. The Geographic Regions of Puerto Rico. Rio Piedras, P. R: Univ. of Puerto Rico Press, 1950.

MLA (9th ed.) Citation

Picó, Rafael. The Geographic Regions of Puerto Rico. Univ. of Puerto Rico Press, 1950.

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