APA Zitierstil

Hannum, E., & Zhang, Y. (2012). Poverty and Proximate Barriers to Learning: Vision Deficiencies, Vision Correction and Educational Outcomes in Rural Northwest China. World development, 40(9), 1921.

Chicago Zitierstil

Hannum, Emily, und Yuping Zhang. "Poverty and Proximate Barriers to Learning: Vision Deficiencies, Vision Correction and Educational Outcomes in Rural Northwest China." World Development 40, no. 9 (2012): 1921.

MLA Zitierstil

Hannum, Emily, und Yuping Zhang. "Poverty and Proximate Barriers to Learning: Vision Deficiencies, Vision Correction and Educational Outcomes in Rural Northwest China." World Development, vol. 40, no. 9, 2012, p. 1921.