There are a few changes to APA style in the 6th edition of the Publication Manual of the American Psychological Association. The main changes are:

Use the DOI for online journals. If no DOI use the home page URL for the journal rather than the database name. The manual advises that this may necessitate a “quick web search to locate this URL”.

Retrieval dates are no longer necessary for websites unless the material may change over time (e.g. Wikis).

When authors number eight or more, include the first six authors’ names, then insert three dots and add the last author’s name, e.g.
Yoon, P. W., Chen, B., Faucett, A., Clyne, M., Gwinn, M., Lubin, I. M., … Muin, J. (2001) Public health impact of genetic tests at the end of the 20th century. Genetics in Medicine, 3, 405-410.