Q. Are end-of-paragraph citations sufficient for APA format?
Your in-text citation should be near the beginning of the paragraph, not the end. If you mention the author(s) by name, then you need include only the date of the chapter in parentheses. You do not need to include another citation to the chapter AS LONG AS it is clear that the entire paragraph is about the same chapter. For more information, see the APA Style Blog entry "When to Include the Year in Citations Appearing More Than Once in a Paragraph" http://blog.apastyle.org/apastyle/2013/04/when-to-include-the-year-in-citations-appearing-more-than-once-in-a-paragraph.html. Your question is asked in the first comment on the blog post.