Try using these search terms, or combinations of terms, within library databases. This list may help you get started, it is by no means complete!
Peer-reviewed journals (also called "scholarly" or "academic" journals) contain original research articles within a specific subject domain.
These articles are reviewed by other experts before publication and share many or all of these qualities:
Here are two examples:
NOTE: Some peer-reviewed journals will include literature reviews, book reviews, and opinion essays. None of these present original research however!