Cita APA (7a ed.)

Ashenfelter, O., & Layard, R. (1993). Handbook of labor economics (1st ed., 2nd impression.). North-Holland.

Cita Chicago Style (17a ed.)

Ashenfelter, Orley, y Richard Layard. Handbook of Labor Economics. 1st ed., 2nd impression. Amsterdam [etc.]: North-Holland, 1993.

Cita MLA (9a ed.)

Ashenfelter, Orley, y Richard Layard. Handbook of Labor Economics. 1st ed., 2nd impression. North-Holland, 1993.