Imperio, E. G. (1995). Sustainable alternative livelihood handbook: A compendium of technologies. Foundation for Sustainable Development and the Environmental Center of the Philippines Foundation.
Cita Chicago (17th ed.)Imperio, Edgard G. Sustainable Alternative Livelihood Handbook: A Compendium of Technologies. Quezon City: Foundation for Sustainable Development and the Environmental Center of the Philippines Foundation, 1995.
Cita MLA (9th ed.)Imperio, Edgard G. Sustainable Alternative Livelihood Handbook: A Compendium of Technologies. Foundation for Sustainable Development and the Environmental Center of the Philippines Foundation, 1995.
Atenció: Aquestes cites poden no estar 100% correctes.