Não informado. (1971). Quality Management and Engineering. Hitchcock Publishing.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Quality Management and Engineering. Wheaton, Ill: Hitchcock Publishing, 1971.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Quality Management and Engineering. Hitchcock Publishing, 1971.
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