Plagiarism is the use of the language and ideas of another author and the representation of them as one's own original work. Regardless if there is intention or not, plagiarism is when we use all of part of the work, ideas or perceptions of other creators representing them as one’s original work.
To be more specific we have plagiarism every time:
1. We use all the work, the words or ideas of another creator without referring to the source from which this information derived.
2. We state unaltered phrases or proposals from a source without putting them in quotation marks “…” and without stating the source from which they come from
3. We paraphrase, namely we presenting an information or the arguments of a writer with our own words or style without referring to the source.
4. We counterfeit or alter the information or data from another source
5. We undertake to do the project for another person and or at the contrary, when we assign to another person to do our project
Thus, in order to avoid any accusations of plagiarism, all sources which were used in the completion of a work/research must be mentioned. Moreover, references for all the quotes of other creators have to be used, since the quote without quotation marks and without referring to the source is also plagiarism. Furthermore, the sources in case they are ideas, theories or information even if they are well known, they have to be mentioned, however they may be unknown to the readers of this project.
Finally, sources that give additional information on the subject must be mentioned either to express different opinions on a subject or to simply help the reader look up the initial sources if there is a relative interest in the subject.
Avoid plagiarism using references and bibliographical references pursuant to the bibliographical standard defined by your teacher.
Consult the Guide for Dissertation and Thesis Writing.