Borromeo, M. E., Manzanilla, M. R. V., & Paras, E. P. A. (1987). Polyurethane and lumbang oil production. College of Engineering.
Chicago-viite (17. p.)Borromeo, Melissa-Sieglinde E., Ma. Ranila V. Manzanilla, ja Eleanor Patricia A. Paras. Polyurethane and Lumbang Oil Production. Diliman, Quezon City: College of Engineering, 1987.
MLA-viite (9. p.)Borromeo, Melissa-Sieglinde E., et al. Polyurethane and Lumbang Oil Production. College of Engineering, 1987.
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