Vasileva, K., & Sartori, F. (2008). Acquisition of citizenship in European Union. Statistics in focus: Population and social conditions.
Chicago-Zitierstil (17. Ausg.)Vasileva, Katya, und Fabio Sartori. "Acquisition of Citizenship in European Union." Statistics in Focus: Population and Social Conditions 2008.
MLA-Zitierstil (8. Ausg.)Vasileva, Katya, und Fabio Sartori. "Acquisition of Citizenship in European Union." Statistics in Focus: Population and Social Conditions, 2008.
警告：這些引文格式不一定是100％准確.