Petkova, R. I., & Yıldırak, N. (2003). Employment trends in the tobacco sector: Selected provinces of Bulgaria and Turkey. International Labour Organization.
Citazione stile Chigago Style (17a edizione)Petkova, Roska Ivanovna, e Nurettin Yıldırak. Employment Trends in the Tobacco Sector: Selected Provinces of Bulgaria and Turkey. International Labour Organization, 2003.
Citatione MLA (9a ed.)Petkova, Roska Ivanovna, e Nurettin Yıldırak. Employment Trends in the Tobacco Sector: Selected Provinces of Bulgaria and Turkey. International Labour Organization, 2003.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.