Well, in the web we can find a lot of links about paraphrasing but these ones are good for me because the techniques are clearly explained by the different authors. In this text we are going to read things like differences between plagiarism and paraphrasing and some good techniques to paraphrase.

http://www.open.ac.uk/skillsforstudy/paraphrasing.php   https://www.indiana.edu/~istd/example1paraphrasing.html thttp://tlu.fbe.unimelb.edu.au/pdfs/helpsheets/citing_and_referencing/paraphrasing.pdf