Joshi, K., Hasan, R., & Asian Development Bank. (2009). Surveys of informal sector enterprises: Some measurement issues. Asian Development Bank.
Chicago Style aipamenaJoshi, Kaushal, Rana Hasan, and Asian Development Bank. Surveys of Informal Sector Enterprises: Some Measurement Issues. Mandaluyong City: Asian Development Bank, 2009.
MLA aipamenaJoshi, Kaushal, et al. Surveys of Informal Sector Enterprises: Some Measurement Issues. Asian Development Bank, 2009.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.