https://www.zotero.org/ is freeware available to download online, and allows you to store all your citations in one place, and then makes it easier to include them in your research papers. Frankly, it's kind of like magic - really really helpful magic!
There's a LibGuide here: https://libguides.depauw.edu/zotero
If you can stand a 7-minute video, this really walks you through the steps - from downloading Zotero, to adding your citations (either manually or direct from library databases), to adding them to your Word or Google documents (both in-text citations/footnotes/endnotes & the bibliography/works cited list).