Plagerizing

What this student did wrong wasn't he didn't cite the source where he got this paragraph  from and so now it is considered plagiarizing or a crime. One thing he could've done to avoid plagiarizing he could of been like this for example- In the site .................... they describe the painting like this "........................................................................................................................................................................" this is a more complex way to describe the picture but i agree with the way he is able to describe this painting. After researching this painting i found a site that was able to describe it well the site http://www.vangoghgallery.com/painting/starryindex.htm 
it described it like this " There is a peaceful essence flowing from the structures. Perhaps the cool dark colors and the fiery windows spark memories of our own warm childhood years filled with imagination of what exists in the night and dark starry skies. The center point of the town is the tall steeple of the church, reigning largely over the smaller buildings. This steeple casts down a sense of stability onto the town, and also creates a sense of size and seclusion.To the left of the painting there is a massive dark structure that develops an even greater sense of size and isolation." i agree with this description because of how well it describes every detail. 
Three ways that you can stop from plagiarizing are in-text citation, or using a works cited page. And just introducing and then putting your quotation. these are the three ways that you can stop from plagiarizing.