To do a works cited list properly, it should include all of the sources used in the essay.
include the URL of any websites used in research.
never include an item if it has an unknown source.
include the titles of the sources in alphabetical order.

Which of these would be most useful in studying the effect of germs exchanged between the new and old worlds? a. a graph showing the number of europeans between 1492 and 1600. b. a graph showing the number of native americans between 1492 and 1600. c. a primary source description of the symptoms of an unknown disease affecting native americans in 1492. o d. a primary source description of the symptoms of an unknown disease affecting europeans in 1492.