Ancheta, J. M., Apacible, E. M., Lontoc, N. A., Manahan, R. R., & Pe, C. B. (1991). A Production systems study on the industrial rubber roller division of People's Rubber Manufacturing and Steelworks, Inc. College of Engineering.

Ancheta, Joselito M., Editha M. Apacible, Norman A. Lontoc, Roderic R. Manahan, and Cliffson B. Pe. A Production Systems Study on the Industrial Rubber Roller Division of People's Rubber Manufacturing and Steelworks, Inc. Diliman, Quezon City: College of Engineering, 1991.

Ancheta, Joselito M., et al. A Production Systems Study on the Industrial Rubber Roller Division of People's Rubber Manufacturing and Steelworks, Inc. College of Engineering, 1991.