Spencer, D. L. (1970). Technology gap in perspective: Strategy of international technology transfer. Spartan.
Cita Chicago (17th ed.)Spencer, Daniel Lloyd. Technology Gap in Perspective: Strategy of International Technology Transfer. New York: Spartan, 1970.
Cita MLA (9th ed.)Spencer, Daniel Lloyd. Technology Gap in Perspective: Strategy of International Technology Transfer. Spartan, 1970.
Atenció: Aquestes cites poden no estar 100% correctes.