Cita APA (7th ed.)

Lubell, H. (1991). The informal sector in the 1980s and 1990s. OECD.

Cita Chicago (17th ed.)

Lubell, Harold. The Informal Sector in the 1980s and 1990s. París: OECD, 1991.

Cita MLA (9th ed.)

Lubell, Harold. The Informal Sector in the 1980s and 1990s. OECD, 1991.