Cita APA

Riddell, A. R., & Nyagura, L. M. (1991). What causes differences in achievement in Zimbabwe's secondary schools? Washington: World Bank.

Citación estilo Chicago

Riddell, Abby Rubin, and Levi Martin Nyagura. What Causes Differences in Achievement in Zimbabwe's Secondary Schools? Washington: World Bank, 1991.

Cita MLA

Riddell, Abby Rubin, and Levi Martin Nyagura. What Causes Differences in Achievement in Zimbabwe's Secondary Schools? Washington: World Bank, 1991.