Cita APA (7a ed.)

Cohen, R. B., Polk, C., & Vuolteenaho, T. (2001). The value spread. National Bureau of Economic Research.

Cita Chicago Style (17a ed.)

Cohen, Randolph B., Christopher Polk, y Tuomo Vuolteenaho. The Value Spread. Cambridge, MA: National Bureau of Economic Research, 2001.

Cita MLA (9a ed.)

Cohen, Randolph B., et al. The Value Spread. National Bureau of Economic Research, 2001.