Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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