Cita APA

Mañalac, S., Senador, A. J., & Escoto, A. D. (2008). Sulfonation of clean and contaminated polystyrene (styrofoam). Philippine Engineering Journal.

Citación estilo Chicago

Mañalac, S., A. Jr Senador, and Angela D. Escoto. "Sulfonation of Clean and Contaminated Polystyrene (styrofoam)." Philippine Engineering Journal 2008.

Cita MLA

Mañalac, S., et al. "Sulfonation of Clean and Contaminated Polystyrene (styrofoam)." Philippine Engineering Journal, 2008.