I have been searching some standards about cryptography best practices. I have found some articles and books but no official standard.
Do cryptography best practices standard exist?
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The ISO provide standards on many things, including cryptographic procedures: ISO/IEC 19790:2012
Only downside with ISO is that you often have to pay to get full access to the standards, so sometimes you'll have to do some googling to find a preview.
Hope this helps.
Your question is a little vague. Not sure if you want to develop your own crypto (not recommended), implement it in a specific language (a question for stackoverflow, probably), or if you want just a set of standards.
For the latter: NIST Cryptographic Standards and Guidelines Development Process