Lubell, H. (1991). The informal sector in the 1980s and 1990s. Development Centre of the Organisation for Economic Co-operation and Development ; OECD Publications and Information Centre, distributor].
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रLubell, Harold. The Informal Sector in the 1980s and 1990s. Paris : [Washington, D.C.: Development Centre of the Organisation for Economic Co-operation and Development ; OECD Publications and Information Centre, distributor], 1991.
एमएलए (9वां संस्करण) प्रशस्ति पत्रLubell, Harold. The Informal Sector in the 1980s and 1990s. Development Centre of the Organisation for Economic Co-operation and Development ; OECD Publications and Information Centre, distributor], 1991.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.