Cita APA (7th ed.)

Eckholm, E. P. (1977). The picture of health: Environmental sources of disease (First edition.). Norton.

Cita Chicago (17th ed.)

Eckholm, Erik P. The Picture of Health: Environmental Sources of Disease. First edition. New York: Norton, 1977.

Cita MLA (8th ed.)

Eckholm, Erik P. The Picture of Health: Environmental Sources of Disease. First edition. Norton, 1977.