Galema, N. F. B., Juan, M. J. M., & Sim, E. G. (2002). A Project feasibility study on ECOPAK: A Product of Ecofoam Manufacturing Company. College of Engineering.
Chicago-referens (17:e uppl.)Galema, Nittanee Frances B., Maria Jann-Ella M. Juan, och Eleanor G. Sim. A Project Feasibility Study on ECOPAK: A Product of Ecofoam Manufacturing Company. Diliman, Quezon City: College of Engineering, 2002.
MLA-referens (9:e uppl.)Galema, Nittanee Frances B., et al. A Project Feasibility Study on ECOPAK: A Product of Ecofoam Manufacturing Company. College of Engineering, 2002.
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