APA aipamena

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

Chicago Style aipamena

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

MLA aipamena

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