Help:Image Description Page

Each image uploaded to commons has an associated image description page. This is also valid for other types of files, especially sounds.

The image description page of any Wikipedia image can be accessed with a simple click on the image. An alternative way to access the description page of an image, if the exact file name is known, is to use the URL of the type http://es.wikipedia.org/wiki/Image:XX, where XX should be replaced by the name of the desired image.

To create a link to an image's description page without the image being included, a wikilink of the type [[:Image:XX]] can be used.

A description page consists of four parts:

1. The image.
2. Description of the image.
3. History of the image.
4. Image links, a list of pages containing the image.

Source

Add a link to the exact site from where you downloaded the image (copy the address that appears in your browser and paste it). If it is not available on the Internet, explain how you got it, even if you did it yourself, you must say so.

Copyright Status

Make sure the image is in the public domain or has been licensed by the author under the terms of the GFDL license. If the author is you, state it, as well as in what terms you transfer the image to Wikipedia.

To indicate this you can use one of these templates:

• Public domain: {{PD}
• GNU Free Documentation License: {{GFDL}}

If you are the author of the image you can easily indicate this using the {{Own}} template. For example, {{Own|GFDL}} indicates that this is your image and that you license it under the GFDL.

If the image is copied from somewhere on the Internet, provide a link to the place where the license terms are clarified.

Images uploaded from other Wikipedias

The fact that an image is in another Wikipedia article does NOT mean that its copyright status is one of the above cases if it is not explicitly described in its description page. To be able to use them, they must be in commons: if they are, just copy their code.