Collier, P., & Lal, D. (1992). Why Poor People Get Rich: Kenya 1960-79. Elgar.
Cita Chicago (17th ed.)Collier, P., i D. Lal. Why Poor People Get Rich: Kenya 1960-79. Elgar, 1992.
Cita MLA (9th ed.)Collier, P., i D. Lal. Why Poor People Get Rich: Kenya 1960-79. Elgar, 1992.
Atenció: Aquestes cites poden no estar 100% correctes.