The three LIS article databases all include citation generating features. If you identify an article of interest, you can easily select a citation style (APA, Chicago, etc.) and generate a proper citation for it.
For advice on citation styles, see:
Purdue University Online Writing Lab (OWL) - an extensive guide to research, writing, and formulating citations.
Research and Documentation Online by Diana Hacker and Barbara Fister - a guide to research and citation in the humanities, social sciences, history, and science. Includes instructions on citing electronic works.
HINT: Using a citation manager like RefWorks can be a time-saver. However, be sure to proofread and correct the bibliography that the software generates.
HINT: Create properly formatted citations using the free web tool, Citation Machine.
References: Thanks to the UIUC LIS Library LIS LibGuide