APA
Costa D. L., Kahn M. E., . (1999). Power couples : changes in the locational choice of the college educated, 1940-1990. Cambridge, Mass: National Bureau of Economic Research.
Chicago
Costa Dora L, Kahn Matthew E, . 1999. Power couples : changes in the locational choice of the college educated, 1940-1990. Cambridge, Mass: National Bureau of Economic Research.
Harvard
Costa D. L., Kahn M. E., . (1999). Power couples : changes in the locational choice of the college educated, 1940-1990. Cambridge, Mass: National Bureau of Economic Research.
MLA
Costa Dora L, Kahn Matthew E, . Power couples : changes in the locational choice of the college educated, 1940-1990. Cambridge, Mass: National Bureau of Economic Research. 1999.