A big change in APA 7th ed. is that students don't have to use a running head in their APA papers. The running head is only required in professional papers; however, you should check with your instructor.
If you do have to use a running head, you're probably wondering what in the world a "running head" is. . .well, the running head is a shortened version of your paper's title. The running head cannot exceed 50 characters, including spacing.
Watch the ERC tutorial to learn how to insert a running head into your paper.
For your list of sources, you should include a References page.
Each citation style refers to the list of sources by a different title.