Gaya APA

Services, D, O, H, A, H. (2019). Environmental Health Perspectives (Vol 127 Issue 9 September 2019). Amerika Serikat: Department of Health and Human Services.

Gaya MLA

Services, Department, Of, Health, And, Human. "Environmental Health Perspectives". Vol 127 Issue 9 September 2019 Amerika Serikat: Department of Health and Human Services, 2019. Text.