MATLAB: How to cite a User’s Guide

Image Processing Toolbox

Hi,
I would like to put a reference in an article with the Image Processing User's Guide. I found on Google Scholar some old bibtex entry:
 @book{thompson1995image,
  title={Image Processing Toolbox: For Use with MATLAB;[user's Guide]},
  author={Thompson, C.M. and Shure, L.},
  year={1995},
  publisher={MathWorks}
 }
but I would like to refer to the latest user's guide: R2011b.
What is the best way to do this?
Thanks,
Razvan

Best Answer

Using www.mathworks.com/help/pdf_doc/gads/gads_tb.pdf and APA style as an example: I would treat it as a mix between a "Report From a Private Organizationin" (<http://owl.english.purdue.edu/owl/resource/560/09/>) and an Electronic Books (<http://owl.english.purdue.edu/owl/resource/560/10/)>. Leading to the following citation:
Mathworks. (2011). Global Optimization Toolbox: User's Guide (r2011b). Retrieved November 10, 2011 from www.mathworks.com/help/pdf_doc/gads/gads_tb.pdf
Noting that I am not sure on if it should be Mathworks, The Mathworks, or The MathWorks. I would also want to double check that I handled the subtitle of User's Guide correctly.
I would also consider looking around and seeing if I could find a more permanent link to the current version.
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