Spencer, R. H. (1983). Planning, implementation, and control in product test and assurance. Prentice-Hall.
Lua i Stíl Chicago (17ú heag.)Spencer, Richard H. Planning, Implementation, and Control in Product Test and Assurance. Englewood Cliffs, N.J: Prentice-Hall, 1983.
Lua MLA (9ú heag.)Spencer, Richard H. Planning, Implementation, and Control in Product Test and Assurance. Prentice-Hall, 1983.
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