Here are a few of the changes in the 7th edition of the APA manual:
The basic format for a citation on a References page is:
Author, A. A., & Author, B. B. (Date of publication). Title of article. Title of Periodical,
volume or number(issue). DOI (or url)
Please be sure to consult the Online Writing Lab (OWL) at Purdue University for specific examples.