APA (7th ed.) Citation

Puerto Rico Experiment Station & United States. Office of Experiment Stations. (1939). Bulletin. U.S. Dept. of Agriculture, Office of Experiment Stations.

Chicago Style (17th ed.) Citation

Puerto Rico Experiment Station and United States. Office of Experiment Stations. Bulletin. Washington: U.S. Dept. of Agriculture, Office of Experiment Stations, 1939.

MLA (9th ed.) Citation

Puerto Rico Experiment Station and United States. Office of Experiment Stations. Bulletin. U.S. Dept. of Agriculture, Office of Experiment Stations, 1939.