Gryna, F. M. (2001). Quality planning and analysis: From product development through use (4th ed.). McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Gryna, Frank M. Quality Planning and Analysis: From Product Development Through Use. 4th ed. Boston: McGraw-Hill, 2001.
Lua MLA (8ú heag.)Gryna, Frank M. Quality Planning and Analysis: From Product Development Through Use. 4th ed. McGraw-Hill, 2001.
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