Eckaus, R. S. (1977). Appropriate technologies for developing countries. National Academy of Sciences.
Chicago Style (17. basım) AtıfEckaus, Richard S. Appropriate Technologies for Developing Countries. Washington: National Academy of Sciences, 1977.
MLA (9th ed.) AtıfEckaus, Richard S. Appropriate Technologies for Developing Countries. National Academy of Sciences, 1977.
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