Only those texts, web pages, pictures, and other media that have the copyright mark,  ©, are protected by copyright law.

I have found a figure that I want to use in my essay. It is marked with the CC-licens CC BY SA. I don't want to use a CC-licens when I publish my essay. Can I still use the figure I found?

I have found some scientific articles that contain data that I want to use in my master thesis. Which of the following alternatives would you recommend?

How does a CC mark on a text or illustration make it easier for you to use something created by someone else? 

You cannot quote a %BLANK%   but you can use the information.