Cita APA (7th ed.)

Bils, M., & Chang, Y. (1999). Wages and the allocation of hours and effort. National Bureau of Economic Research.

Cita Chicago (17th ed.)

Bils, Mark, i Yongsung Chang. Wages and the Allocation of Hours and Effort. Cambridge: National Bureau of Economic Research, 1999.

Cita MLA (9th ed.)

Bils, Mark, i Yongsung Chang. Wages and the Allocation of Hours and Effort. National Bureau of Economic Research, 1999.