Tarcena, Benjamin Jr. G. (2006) A study on the elimination of the rejection rate of Oshibuchi 3-20-3, a selected item at Nanbu Philippines, Inc. Undergraduate thesis, De La Salle University-Dasmariñas.

Conte, Timothy James and Estrella, Jojemar and Tarcena, Benjamin Jr. G. (2005) The elimination of the 9% customer rejection rate of Plastic-Tana 809 at Nanbu Philippines, Incorporated. Undergraduate thesis, De La Salle University-Dasmariñas.