Cheng, G., Cheung, E., Sy, J., Sy, R., & Tan, N. (1986). A Study on the production system of Asian rubber and Footwear Manufacturing. College of Engineering.
Citace podle Chicago (17th ed.)Cheng, Grace, Edison Cheung, Jeaneth Sy, Roger Sy, a Nelson Tan. A Study on the Production System of Asian Rubber and Footwear Manufacturing. Diliman, Quezon City: College of Engineering, 1986.
Citace podle MLA (9th ed.)Cheng, Grace, et al. A Study on the Production System of Asian Rubber and Footwear Manufacturing. College of Engineering, 1986.
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