APA
Psacharopoulos G., Velez E & Rojas C. (1992). Achievement Evaluation Of Colombia's Escuela Nueva: Is Multigrade The Answer?. Washigton: World Bank.
Chicago
Psacharopoulos G, Velez E and Rojas C. 1992. Achievement Evaluation Of Colombia's Escuela Nueva: Is Multigrade The Answer?. Washigton: World Bank.
Harvard
Psacharopoulos G., Velez E and Rojas C. (1992). Achievement Evaluation Of Colombia's Escuela Nueva: Is Multigrade The Answer?. Washigton: World Bank.
MLA
Psacharopoulos G, Velez E and Rojas C. Achievement Evaluation Of Colombia's Escuela Nueva: Is Multigrade The Answer?. Washigton: World Bank. 1992.