Yes, except that there is a citation between the source and the person and finally the fact that it is attached to.
Source A > Citation > John > Fact Whatever
Source B > Citation > Jim > Fact Whatever.
After replacing Source A with B, all citations attached to A will attach to B.
The information about source A will be DISCARDED (ie author, date of publication, etc.) and replaced with B.
Source A and B might be compared to the name of a book; the citation might be compared to the page number in the book.
You might setup a "play" database to experiment. I have a "play" database that I experiment with all the time.