Article sources typically include the journal, volume, issue, page numbers, and DOI. Spell out the entire journal title; do not abbreviate it. The journal title and volume should be italicized.
If an article is freely available online and does not have a DOI, you may choose to add the URL to the full-text.
The source for a book is the publisher.
Hain, P. (2018). Mandela: His essential life. Rowman & Littlefield.
If you are using a portion of a book, such as a chapter in an edited book, the source also includes the information from the book being used.
Internet sources usually include Website name and URL.