1. Administrative Order (AO) 2002-0096 – Guidelines for multiple micronutrient supplementation for pregnant women in UNICEF CPC V Areas. http://home.doh.gov.ph/ao/ao96-02.pdf . Accessed 17 January 2012
2. Administrative Order (AO) 2003-0119 — Updated guidelines on micronutrient supplementation (vitamin a, iron, and iodine). http://home.doh.gov.ph/ao/ao119-03.pdf . Accessed 17 January 2012
3. Administrative Order (AO) 2010-0010 Revised policy on micronutrient supplementation to support achievement of 2015 MDG targets to reduce under five and maternal deaths and address micronutrient needs of other population groups. http://202.90.151.88/nnc/opt_cgs/dohao10.pdf . Accessed 17 January 2012
4. Briones TK, Tantengco AT, Pascasio FM, Garcia FP, Reyes MT (eds) (1984) Applied human genetics. JMC Press, Inc., Quezon City, Philippines, pp 145–154
5. Central Intelligence Agency (CIA) (2011) The world factbook. https://www.cia.gov/library/publications/the-world-factbook/geos/rp.html . Accessed 17 January 2012