Walker, D. A. (1979). Understanding pictures: A study in the design of appropriate visual materials for education in developing countries. Center for International Education, University of Massachusetts.
Chicago Style (17th ed.) CitationWalker, David Addison. Understanding Pictures: A Study in the Design of Appropriate Visual Materials for Education in Developing Countries. Amherst, MA: Center for International Education, University of Massachusetts, 1979.
MLA (9th ed.) CitationWalker, David Addison. Understanding Pictures: A Study in the Design of Appropriate Visual Materials for Education in Developing Countries. Center for International Education, University of Massachusetts, 1979.
Warning: These citations may not always be 100% accurate.