Puerto Rico. Bureau of Labor Statistics, Jaffe, A. J., & Ortiz, E. F. d. (1952). Results of tests on measuring underemployment in Puerto Rico, June and July 1952. s.n.
Chicago-referens (17:e uppl.)Puerto Rico. Bureau of Labor Statistics, Abram J. Jaffe, och Elydia Fort de Ortiz. Results of Tests on Measuring Underemployment in Puerto Rico, June and July 1952. [San Juan]: s.n, 1952.
MLA-referens (9:e uppl.)Puerto Rico. Bureau of Labor Statistics, et al. Results of Tests on Measuring Underemployment in Puerto Rico, June and July 1952. s.n, 1952.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.