Bicol, J. P. G., & Razon, L. F. (2007). Evaluation of biodiesel from Canarium ovatum (pili) pulp oil and Psophocarpus tetragonolobus (winged bean) seed oil. Philippine Agricultural Scientist, The (Formerly the Philippine Agriculturist).
Cita Chicago (17th ed.)Bicol, John Paul G., i Luis F. Razon. "Evaluation of Biodiesel from Canarium Ovatum (pili) Pulp Oil and Psophocarpus Tetragonolobus (winged Bean) Seed Oil." Philippine Agricultural Scientist, The (Formerly the Philippine Agriculturist) 2007.
Cita MLA (9th ed.)Bicol, John Paul G., i Luis F. Razon. "Evaluation of Biodiesel from Canarium Ovatum (pili) Pulp Oil and Psophocarpus Tetragonolobus (winged Bean) Seed Oil." Philippine Agricultural Scientist, The (Formerly the Philippine Agriculturist), 2007.