De Guzman, C. C. (1996). The essential oils research and development program (EORDP): Linking its endeavors to essential oils production in the Philippines. Philippine Agricultural Scientist, The (Formerly the Philippine Agriculturist).
Cita Chicago (17th ed.)De Guzman, Constancio C. "The Essential Oils Research and Development Program (EORDP): Linking Its Endeavors to Essential Oils Production in the Philippines." Philippine Agricultural Scientist, The (Formerly the Philippine Agriculturist) 1996.
Cita MLA (9th ed.)De Guzman, Constancio C. "The Essential Oils Research and Development Program (EORDP): Linking Its Endeavors to Essential Oils Production in the Philippines." Philippine Agricultural Scientist, The (Formerly the Philippine Agriculturist), 1996.