What do I do when I can't find the source of this chapter of a book so I can cite it APA style? I have found part of a book in .pdf file format and it contains some information I would like to use in my study. I'm trying to cite the book APA style, but I can't find any information on it whatsoever. I've spent ages searching around for any information I could find from within the PDF, but failed as only that specific PDF keeps popping up in the results. I can't make a citation if I don't even know the title of the book or the author. 

My citation currently looks like this, with "Onbekend" meaning unknown and "z.j." meaning no year:


  Onbekend. (z.j.). Onbekend. Opgehaald van
  http://wps.pearsoned.co.uk/wps/media/objects/10977/11240737/Web%20chapters/Chapter%2012_WEB.pdf


Which is unacceptable.

The part of the book in question is here.

What should I do now?
The book your looking for seems to be: 

Modern Database Management

By Jeffrey A. Hoffer, Fred R. McFadden, Mary B. Prescott

https://books.google.co.uk/books/about/Modern_Database_Management.html?id=cYfDQgAACAAJ&amp;redir_esc=y&amp;hl=en