This image was taken by Maximilian Dörrbecker. Attribution to Wikipedia or another project of the Wikimedia foundation is required if it is used outside of projects of the Wikimedia foundation.

This file is licensed under the Creative Commons Attribution-Share Alike 2.5 Generic license.

Tibi licet:

• communicare – copiare, distribuere et committere hoc opus
• to remix – to adapt the work

His condicionibus:

• attributio – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
• aequa parte – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.

https://creativecommons.org/licenses/by-sa/2.5CC BY-SA 2.5 Creative Commons Attribution-Share Alike 2.5 truetrue

"I want to use the image. How do I do that?"

You can use this image freely for any purpose, including commercial use, provided that you license it under the above license. My suggestion is to use the following text:

This Wikipedia and Wikimedia Commons image is from the user Maximilian Dörrbecker (Chumwa) and is freely available at //commons.wikimedia.org/wiki/File:M%C3%BCnchen_-_Kulturhaus_Milbertshofen.jpg under the creative commons cc-by-sa 2.5 license.