Philippines. Department of Health, Helen Keller International, Philippines, United States. Agency for International Development, Task Force Sight and Life (Switzerland), & Lopez, C. T. (1997). Xerophthalmia status and vitamin A supplementation coverage, participation in Operation Timbang and knowledge levels of mothers and caretakers on vitamin A and vitamin A deficiency: VITEX Baseline Survey, 1991. Helen Keller International, Philippines.
Style de citation Chicago (17e éd.)Philippines. Department of Health, Philippines Helen Keller International, United States. Agency for International Development, Task Force Sight and Life (Switzerland), et Charito Tuason- Lopez. Xerophthalmia Status and Vitamin A Supplementation Coverage, Participation in Operation Timbang and Knowledge Levels of Mothers and Caretakers on Vitamin A and Vitamin A Deficiency: VITEX Baseline Survey, 1991. New York: Helen Keller International, Philippines, 1997.
Style de citation MLA (9e éd.)Philippines. Department of Health, et al. Xerophthalmia Status and Vitamin A Supplementation Coverage, Participation in Operation Timbang and Knowledge Levels of Mothers and Caretakers on Vitamin A and Vitamin A Deficiency: VITEX Baseline Survey, 1991. Helen Keller International, Philippines, 1997.