In addition to keeping oneself out of trouble with copyright compliance rules and university conduct policies, citing your sources allows others to reproduce and build on your research, creating new scholarship.
This is a link to the most used citation styles at ASU.
In many of the ASU databases, look for the CITE button at the top of the page (will do a whole page or only those check marked) or open the record by clicking on the title and then look for the CITE button. Pay attention to the Citation Style. Most allow you to change the citation style to the one you need.