Each of the Creative Commons licenses requires acknowledging the author and attributing the work. CC licenses allow for flexibility in the way credit is provided depending on the medium, means, and context in which a licensee is redistributing licensed material. For example, providing attribution to the creator when using licensed material in a blog post may be different than doing so in a video remix. This flexibility facilitates compliance by licensees and reduces uncertainty about different types of reuse. U.S. Copyright law does not usually care much about attribution or correct citation, but with a Creative Commons License, you receive attribution as a condition of all of the licenses.
When attributing others, a good rule of thumb is to use the acronym TASL,
- Title
- Author
- Source
- License
Pay attention to any copyright notices, such as a notice that refers to the disclaimer of warranties or a notice of previous modifications. Best practice is to just retain everything by copying and pasting such notices into your attribution. Don't forget to note in the attribution if you modified a work.
If you have any doubts or questions, you can read the complete attribution requirements, which are spelled out in detail in the legal code of every CC license.