Philippines. Ministry of Agriculture & Planning Service. (1979). Ministry of Agriculture handbook. National Media Production Center.
Cita Chicago (17th ed.)Philippines. Ministry of Agriculture i Planning Service. Ministry of Agriculture Handbook. Manila: National Media Production Center, 1979.
Cita MLA (9th ed.)Philippines. Ministry of Agriculture i Planning Service. Ministry of Agriculture Handbook. National Media Production Center, 1979.
Atenció: Aquestes cites poden no estar 100% correctes.