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.
Citazione stile Chigago Style (17a edizione)Philippines. Department of Health, Philippines Helen Keller International, United States. Agency for International Development, Task Force Sight and Life (Switzerland), e 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.
Citatione MLA (9a ed.)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.