Farrell, J. P., & Heyneman, S. P. (1989). Textbooks in the developing world: Economic and educational choices. World Bank.
Chicago Style (17. basım) AtıfFarrell, Joseph P., ve Stephen P. Heyneman. Textbooks in the Developing World: Economic and Educational Choices. Washington: World Bank, 1989.
MLA (9th ed.) AtıfFarrell, Joseph P., ve Stephen P. Heyneman. Textbooks in the Developing World: Economic and Educational Choices. World Bank, 1989.
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