bibtex entries for versions of the c++ standard
I just had to use a better search query. "cite ISO/IEC 14882:2011" gives as a first result this page: https://www.bibsonomy.org/bibtex/24b660c16d9a5ab0ad595b1555402c797/gron. 

Here's the BibTeX entry:

@book{ISO:2012:III,
  added-at = {2012-10-08T01:13:47.000+0200},
  address = {Geneva, Switzerland},
  author = {{ISO}},
  bibdate = {Mon Dec 19 11:12:12 2011},
  bibsource = {http://www.math.utah.edu/pub/tex/bib/isostd.bib},
  biburl = {https://www.bibsonomy.org/bibtex/24b660c16d9a5ab0ad595b1555402c797/gron},
  day = 28,
  interhash = {ff5df6d7fa67f89d7d5ea964dab3e3c9},
  intrahash = {4b660c16d9a5ab0ad595b1555402c797},
  keywords = {C++ Specification Standard},
  month = feb,
  pages = {1338 (est.)},
  publisher = {International Organization for Standardization},
  remark = {Revises ISO/IEC 14882:2003.},
  timestamp = {2012-10-08T01:13:47.000+0200},
  title = {{ISO/IEC 14882:2011 Information technology --- Programming languages --- C++}},
  url = {http://www.iso.org/iso/iso_catalogue/catalogue_tc/catalogue_detail.htm?csnumber=50372},
  year = 2012
}