There are two online library instruction workshops in which you can assign to students learning the basics when it comes to citing sources. The first is an APA Citation Style workshop that helps students identify parts of APA citations for books, journal articles, and web pages as well as how to create in-text citations and a reference list. The link for students to enroll and earn a badge is here.
The second workshop is all about avoiding plagiarism by learning about common knowledge, types of plagiarism and how to avoid plagiarizing material that should be cited. The link for students to enroll and earn a badge for this one is here.