Cita APA (7th ed.)

Santos, M. I., & Serrano, J. The informal sector: Focus on four vending areas.

Cita Chicago (17th ed.)

Santos, Ma. Imelda, i Jonathan Serrano. The Informal Sector: Focus on Four Vending Areas.

Cita MLA (9th ed.)

Santos, Ma. Imelda, i Jonathan Serrano. The Informal Sector: Focus on Four Vending Areas.