Cheng, G., Cheung, E., Sy, J., & Tan, N. (1991). Production information system of Thames Industries. College of Engineering.
Cita Chicago (17th ed.)Cheng, Grace, Edison Cheung, Jeaneth Sy, i Nelson Tan. Production Information System of Thames Industries. Diliman, Quezon City: College of Engineering, 1991.
Cita MLA (9th ed.)Cheng, Grace, et al. Production Information System of Thames Industries. College of Engineering, 1991.
Atenció: Aquestes cites poden no estar 100% correctes.