Spencer, D. L. (1970). Technology gap in perspective: Strategy of international technology transfer. Spartan.
Citace podle Chicago (17th ed.)Spencer, Daniel Lloyd. Technology Gap in Perspective: Strategy of International Technology Transfer. New York: Spartan, 1970.
Citace podle MLA (9th ed.)Spencer, Daniel Lloyd. Technology Gap in Perspective: Strategy of International Technology Transfer. Spartan, 1970.
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