Philippines. Department of Agriculture & Philippine Information Agency. (1991). Kaalaman sa buhay (Facts for Life) (Pambansang edisyon.). Department of Agriculture (DA) sa pakikipag-ugnayan sa Philippine Information Agency (PIA) at United Nations Children's Fund (UNICEF).
Cita Chicago (17th ed.)Philippines. Department of Agriculture i Philippine Information Agency. Kaalaman Sa Buhay (Facts for Life). Pambansang edisyon. Manila: Department of Agriculture (DA) sa pakikipag-ugnayan sa Philippine Information Agency (PIA) at United Nations Children's Fund (UNICEF), 1991.
Cita MLA (9th ed.)Philippines. Department of Agriculture i Philippine Information Agency. Kaalaman Sa Buhay (Facts for Life). Pambansang edisyon. Department of Agriculture (DA) sa pakikipag-ugnayan sa Philippine Information Agency (PIA) at United Nations Children's Fund (UNICEF), 1991.