1. Rules and regulations to implement presidential Decree No. 1433;BPI Quarantine Administrative Order No. 1 s,1981
2. Procedural manual on domestic quarantine;BPI Quarantine Administrative Order No. 3, s,2018
3. Procedural manual in the conduct of phytosanitary import inspection;BPI Quarantine Order No.02, s,2018
4. Bureau of Plant Industry website. https://www.buplant.da.gov.ph.
5. Guidelines on the importation of plants, planting materials and plant products for commercial purposes;DA Department Circular No. 4 s,2016