Martinez, D. A., Bangalan, D. P., Santos, R. A., & Serdoncillo, G. (2004). An Industrial systems study for Spiga Coffee Cartel. College of Engineering.
Citace podle Chicago (17th ed.)Martinez, Deanne A., Darwin P. Bangalan, Rowell Angelo Santos, a Guy Serdoncillo. An Industrial Systems Study for Spiga Coffee Cartel. Diliman, Quezon City: College of Engineering, 2004.
Citace podle MLA (9th ed.)Martinez, Deanne A., et al. An Industrial Systems Study for Spiga Coffee Cartel. College of Engineering, 2004.
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