Everything on the Internet is owned by someone. Just like you're stealing if you take anything (unless it's discarded).
Therefore, everything is under copyright protection and you need to ask for permission or cite (give the source) the author/website.
A citation describes the source of the information - author, title, date, book/website
Use these online editors to create citations from website addresses, books, etc.
This is NOT a citation! It's just a website!
https://en.wikipedia.org/wiki/Michael_Jordan
This is its citation!
Wikipedia. Wikimedia Foundation, n.d. Web. 12 Dec. 2015. <https://en.wikipedia.org/wiki/Michael_Jordan>.
Reference an Image
Add the image's website address to cite an image
Common Citations
1. Websites: Enter the website address and be sure to check the box to include the website address in the citation
2. Books: Enter the author's name and book name
Video: How to Use EasyBib.com & Google Drive
Also, try the EasyBib Google Docs Add-on (works within the doc!)