Chu, M. R., Fulgencio, C., & Lin, I. (1999). An Industrial quality control study on Grandspan Development Corporation. College of Engineering.
Lua i Stíl Chicago (17ú heag.)Chu, Ma. Rosario, Charisma Fulgencio, agus Ingrid Lin. An Industrial Quality Control Study on Grandspan Development Corporation. Diliman, Quezon City: College of Engineering, 1999.
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