Keep in mind that you might not need permission if:
So, you have determined that the work you want to use is probably not in the public domain, and that it is not available under a Creative Commons license (or that your use is not covered by an existing license). You don't think your use is covered by any of the exceptions or limitations, including fair use (or you just feel unsure whether your use is a fair use.) You may still be able to use the work, if you seek permission.
Seeking copyright permission can be work. If you're interested in seeking permission, these are the steps you'll need to take: