Situations in which paraphrases must be credited to the original source include:
An idea is common knowledge if:
Taken from: The Art of Paraphrasing, GSI Teaching and Resource Center, University of California, Berkeley
From: Purdue Owl
Students frequently overuse direct quotation in taking notes, and as a result they overuse quotations in the final [research] paper. Probably only about 10% of your final manuscript should appear as directly quoted matter. Therefore, you should strive to limit the amount of exact transcribing of source materials while taking notes. Lester, James D. Writing Research Papers. 2nd ed., 1976, pp. 46-47.
In research papers, students often quote excessively, failing to keep quoted material down to a desirable level. Since the problem usually originates during note taking, it is essential to minimize the material recorded verbatim (Lester 46-47).
Students should take just a few notes in direct quotation from sources to help minimize the amount of quoted material in a research paper (Lester 46-47).
Students often use too many direct quotations when they take notes, resulting in too many of them in the final research paper. In fact, probably only about 10% of the final copy should consist of directly quoted material. So it is important to limit the amount of source material copied while taking notes.
A note about plagiarism: This example has been classed as plagiarism, in part, because of its failure to deploy any citation. Plagiarism is a serious offense in the academic world. However, we acknowledge that plagiarism is a difficult term to define; that its definition may be contextually sensitive; and that not all instances of plagiarism are created equal—that is, there are varying “degrees of egregiousness” for different cases of plagiarism.
Taken from - Purdue Owl
The case also illustrated how supply network interactions were critical in defining and specifying products and components through liaison between customer and supplier specialists. Perhaps the strongest theme that emerged from the case study was that collaboration in the supply network tended to be driven, and introduced, by IKEA, the powerful customer exerting its influence over other supply network actors. The influence on global sourcing decisions, however, was not purely dyadic between IKEA and Sapabut gradually extended to the entire supply network. Thus, relation-ships between suppliers were identified and set up by the customer, but cascaded independently into deeper interactions amongst suppliers at different tiers of the supply network.
Hultman, J., Johnsen, T., Johnsen, R., & Hertz, S. (2012). An interaction approach to global sourcing: A case study of IKEA. Journal of Purchasing and Supply Management, 18, 9–21. https://doi.org/10.1016/j.pursup.2011.11.001