When you use the ideas of another author in your own writing, you need to paraphrase or summarize the points made and correctly cite the source. You can avoid inadvertently using the exact words of your source by writing the idea in your own words.
Original source quote: "The whole history of art is a history of modes of visual perception of the various ways in which man has seen the world."
For example: The way that art has developed over the years can be determined by how people see the world around them (Blyde, 1975).
In this example, the student has rewritten the information in his or her own words and credited the ideas to the original author. Copying the author's text too closely without quoting it directly is considered plagiarism. The following sentence is considered plagiarism even if you cite the original author.
For example : The history of art can be seen as a history of modes of visual perception (Blyde, 1975).