According to Plagiarism.org, all of the following are considered plagiarism:
By including a reference to Plagiarism.org and placing the borrowed content in quotations, this text box is not plagiarising the source material. However, academic papers have stricter rules for preventing plagiarism which are called citation styles. The other sections of the Citation Guide detail the requirements of the main citation styles. The infographic below provides information about the different ways you can utilize someone else's information.
Direct quotations are short, word-for-word excerpts from the original source. Direct quotations MUST be cited and you are required to include the page number (or numbers) of the quote's location in the in-text citation.
Paraphrases take information from the original source and put it into your own words. If the source is not common knowledge, then paraphrases MUST still be cited. Usually, paraphrases are slightly condensed compared to the original source.
Summaries take overarching themes (such as an experiment's methodology or an essay's main ideas) from the original source and puts it into your own words. If the material is not common knowledge, then summaries MUST still be cited. Summaries are very condensed compared to the original source.