APA (7th ed.) Citation

Constant, A., & Zimmermann, K. F. (2007). Circular migration: Counts of exits and years away from the host country. CEPR.

Chicago Style (17th ed.) Citation

Constant, Amelie, and Klaus F. Zimmermann. Circular Migration: Counts of Exits and Years Away from the Host Country. London: CEPR, 2007.

MLA (9th ed.) Citation

Constant, Amelie, and Klaus F. Zimmermann. Circular Migration: Counts of Exits and Years Away from the Host Country. CEPR, 2007.