Citation is your indication that certain material in your work came from another source. It also provides readers with the information necessary to find that source again. Giving credit to the original author by citing sources is the only way to use other people's work without plagiarizing.
The following situations almost always require citation:
Adapted from: Plagiarism.org
There are two places you need to cite your sources:
NoodleTools has tools to help you!
NoodleTools has a tutorial on how to create citation records in ALA, MLA and Chicago styles. Once you create a project and add these records, you can view your complete resources list.
Source: NoodleTools Help Desk
Source: NoodleTools Help Desk
NOTE: You may not always see the DOI information for a resource in its reference information, but you can look it up using the Crossref information base!
Sources: Crossref, Scribbr, The DOI Foundation