The best source for APA style citations is the Publication Manual of the American Psychological Association, but there are online citation generators that are reasonably accurate in creating citations, if used carefully.
1. Always double check that the citation generator is using APA 6th edition style.
2. Make sure you enter the type of source and all the information you have available.
3. Check the generated citations against a reliable APA style source, such as the Publication Manual or the Purdue OWL website.