Citation Machine
https://www.citationmachine.net/apa
At Citation Machine, you can generate citations for your paper in MLA, APA, and Chicago styles. You can also check your paper for plagiarism on this site. Additionally, Citation Machine has a student blog for the latest citation information and research tips.
Purdue Online Writing Lab
https://owl.purdue.edu/owl/research_and_citation/resources.html
The Purdue Online Writing Lab helps you cite in various formats such as APA, MLA, Chicago Manual, IEEE, and AMA style. In addition, it offers resources on how to conduct research as well as use it in your own documents.
Cite This for Me
https://www.citethisforme.com/
You can create citations in Harvard, APA, and MLA formats for your bibliography at Cite This for Me. This website also has its citation guides for various formats to help you better understand citation. You can, moreover, cite while you search by installing their Chrome add-on.
EasyBib
EasyBib is another popular citation generator for MLA, APA, and Chicago styles. They have a weekly Student and Teacher Blog for Better Papers, as well as a writing center with plenty of infographics, articles, guides, lesson plans, videos, and other resources for the entire research process.