APA (7th ed.) Citation

Richardson, L. C., & Rotkin, C. E. (1947). Puerto Rico: Caribbean crossroads. U.S. Camera Pub. Corp..

Chicago Style (17th ed.) Citation

Richardson, Lewis Cutter, and Charles E. Rotkin. Puerto Rico: Caribbean Crossroads. New York: U.S. Camera Pub. Corp., 1947.

MLA (9th ed.) Citation

Richardson, Lewis Cutter, and Charles E. Rotkin. Puerto Rico: Caribbean Crossroads. U.S. Camera Pub. Corp., 1947.

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