APA (7th ed.) Citation

Puerto Rico. Insular Experiment Station. (1933). Circular. Estación Experimental Insular.

Chicago Style (17th ed.) Citation

Puerto Rico. Insular Experiment Station. Circular. San Juan, P.R.: Estación Experimental Insular, 1933.

MLA (9th ed.) Citation

Puerto Rico. Insular Experiment Station. Circular. Estación Experimental Insular, 1933.

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