HMT. (2014). PRODUCTION TECHNOLOGY (36 ed.). MC GRAW HILL.
Lua i Stíl Chicago (17ú heag.)HMT. PRODUCTION TECHNOLOGY. 36 ed. NEW DELHI: MC GRAW HILL, 2014.
Lua MLA (9ú heag.)HMT. PRODUCTION TECHNOLOGY. 36 ed. MC GRAW HILL, 2014.
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