Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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