Humphreys, M. E. (2001). "Yellow Fever" and "Malaria". In P. Boyer (Ed.), The Oxford Companion to United States History. Oxford: Oxford University Press.

Humphreys, M. E. “"Yellow Fever" and "Malaria".” In The Oxford Companion to United States History, edited by Paul Boyer. Oxford: Oxford University Press, 2001.

Humphreys ME. "Yellow Fever" and "Malaria". In: Boyer P, editor. The Oxford Companion to United States History. Oxford: Oxford University Press; 2001.

Humphreys, M. E. “"Yellow Fever" and "Malaria".” The Oxford Companion to United States History, edited by Paul Boyer, Oxford: Oxford University Press, 2001.

Humphreys ME. "Yellow Fever" and "Malaria". In: Boyer P, editor. The Oxford Companion to United States History. Oxford: Oxford University Press; 2001.