Eckholm, E. P. (1977). The picture of health: Environmental sources of disease. Norton.
Citazione stile Chigago Style (17a edizione)Eckholm, Erik P. The Picture of Health: Environmental Sources of Disease. New York: Norton, 1977.
Citatione MLA (9a ed.)Eckholm, Erik P. The Picture of Health: Environmental Sources of Disease. Norton, 1977.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.