Choosing the appropriate sources will make avoiding plagiarism easier.
While Google is the "go-to" source for most students, the library has free access to scholarly databases with subject-specific articles, in addition to books. Library databases supply sample citations for most sources.
When copying material, whether using copy/paste, making photocopies or handwriting onto notecards, remember to:
Examples from Academic Search Complete and Opposing Viewpoints in Context databases.
Guest lecture on plagiarism, paraphrases, direct quotations and source citations for students at the UMUC (University of Maryland-University College).
Paraphrasing is more than changing a couple of words from a source.