Não informado. Puerto Rico Journal of Public Health and Tropical Medicine. Department of Health of Puerto Rico.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিNão informado. Puerto Rico Journal of Public Health and Tropical Medicine. San Juan: Department of Health of Puerto Rico.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিNão informado. Puerto Rico Journal of Public Health and Tropical Medicine. Department of Health of Puerto Rico.
সতর্কবাণী: সাইটেশন সবসময় 100% নির্ভুল হতে পারে না.