The "Publication Manual" is the style manual of choice for writers, editors, students, and educators. Although it is specifically designed to help writers in the behavioral sciences and social sciences, anyone who writes non-fiction prose can benefit from its guidance.
The newly-revised Sixth Edition has not only been rewritten. It has also been thoroughly rethought and reorganized, making it the most user-friendly "Publication Manual" the APA has ever produced. You will be able to find answers to your questions faster than ever before. When you need advice on how to present information, including text, data, and graphics, for publication in any type of format--such as college and university papers, professional journals, presentations for colleagues, and online publication--you will find the advice you're looking for in the "Publication Manual."
Easier to read with a lot less pages. The 6th edition is a mere 272 pages vs. a whopping 439 pages in the 5th edition. This improves its portability and lap-use. ( I never could understand why a book that insists on 1 inch margins all around used 1.5 inch margin on the outer margins and left so much wasted unused space on the pages).
Material has been streamlined to reflect more of the electronic resources currently being used and the more obscure material has been consolidated. The newly added chapters on ethics, the publication process and journal article reporting standards are quite helpful. Some reviewers complained about the elimination of the chapters on writing for publication. Since each journal has it's own specific criteria for manuscript submission, I don't consider this a huge loss. Still has lots of sample for various references (and even includes video blog sources like you-tube) and information on how to display data results (Including radiologic and imaging data like MRI images)
So glad I bought the newest version, especially since it's currently half the price of the old version and a lot more user friendly and up to date. If you required to use the APA style, I strongly suggest buying this book.