Citation type for a NIST Publications In my masters thesis I need to cite from "NIST Special Publication 800-22". 
We are to use IEEE referencing style and I am using an online LaTeX editor to get this done.

Now that this document I need to refer to is a PDF document, I have no idea what is the type of the document that I should treat it as. Is that okay if I treat it as an article? Or else is there any other type that it should fall under?
At least in my field, NIST special publications and technical notes are cited as handbooks or reports. In particular, I'd cite that as follows:


  A. Rukhin et al., "A Statistical Test Suite for Random and
  Pseudorandom Number Generators for Cryptographic Applications", NIST
  Special Publication 800-22, US Department of Commerce, National
  Institute of Standards and Technology, Gaithersburg, MD, April 2010.