memory of nobody

So I found this journal "International Research Journal of Computer Science Engineering and Applications" In Vol 2 Issue 4 April 2013 ISSN 2319-8672 I am not sure whether it was intended or simply the reviewing process is crappy. But I believe more on the latter. Two types of citations being used, IEEE and APA style concurrently, for a so called "journal". How's that even possible?

Laman web Jason Davis  membolehkan anda untuk membuat word cloud berdasarkan akaun twitter dan perkataan yang anda beri. Cubalah!

I found this ebook written by the original textbook author "Python for Computational Science". With several reviews ranged 4 to 5 out of 5 stars, I assume the printed book must be good. But I found this PDF, not sure whether it's the same book, or the previous editions. Some book authors have a good practice sharing their own PDF to be read by the public.  Here goes