APA
Belev B., . (2003). The Informal Economy in the EU Accession Countries: Size, Scope, Trends and Challenges to the Process of EU Enlargement. Sofia: Center for the Study of Democracy.
Chicago
Belev Boyan, . 2003. The Informal Economy in the EU Accession Countries: Size, Scope, Trends and Challenges to the Process of EU Enlargement. Sofia: Center for the Study of Democracy.
Harvard
Belev B., . (2003). The Informal Economy in the EU Accession Countries: Size, Scope, Trends and Challenges to the Process of EU Enlargement. Sofia: Center for the Study of Democracy.
MLA
Belev Boyan, . The Informal Economy in the EU Accession Countries: Size, Scope, Trends and Challenges to the Process of EU Enlargement. Sofia: Center for the Study of Democracy. 2003.