APA (7th ed.) Citation

Gathmann, C., & Keller, N. (2014). Returns to citizenship?: Evidence from Germany's recent immigration reforms. Discussion paper series.

Chicago Style (17th ed.) Citation

Gathmann, Christina, and Nicolas Keller. "Returns to Citizenship?: Evidence from Germany's Recent Immigration Reforms." Discussion Paper Series 2014.

MLA (9th ed.) Citation

Gathmann, Christina, and Nicolas Keller. "Returns to Citizenship?: Evidence from Germany's Recent Immigration Reforms." Discussion Paper Series, 2014.