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Self-plagiarism is the use of one's own previous work in another context without citing that it was used previously.

self-plasiarism is when you pretend that what you have done is your pure work while it is somenone elese's work and efforts that you have used without citing it.

Self-Plagiarism is using ur own previously done work, in a new work without niether citing it nor quoting it .

for more in depth look plz check this link http://en.writecheck.com/self-plagiarism/ 

self-plagiarism is when an author or other content creator uses portions of an earlier work in a new one without citing the original content.

 self-plagiarism is when he uses his own previously published material, without making any reference to the earlier published work.

Attributed work of others to you without citing that it was used 

Is the act of stealing someone else's work and attempting to "pass it off" as your own.

Self-Plagiarism is a scientific stealing, when a person added to his work a work of another person without citing this work