The answer is: Citations
Citations is a short reference that is placed on a certain writing in order to provide the readers with the information that some of the data placed in the writing is taken from outside sources.
The data that included from those outside sources often only in small fractions. So the citation is made so the readers could identify the source and evaluate the data by themselves.
A . Colonial boycotts hurt British trade
African Americans moved north to avoid slavery. They also moved north for more opportunity. <span />
