T-A-S-L (Title, Author, Source, License) - information about the image that you'll need
Title - (if there is one) and the link to the source page
Author name - and link to the author's profile page (if there is one)
Source name - and link (if not already gathered with the title)
License - Creative Commons designation and link to CC details
With this information in hand, you are ready to create a caption for your image.
Use Open Attribution Builder - http://openwa.org/open-attrib-builder/
Most images that you use should have captions, but you only need to create citations for those images used as sources in your work--just as you would do for an article, book, website, or other types of sources.
MLA 7th edition (indexed under "photographs")
Poupeau, Gautier. "Detail de la Main de Dakini Dansante." flickr. N.p., 18 Jan. 2015. Web. 24 Feb. 2017. <http://www.flickr.com/photos/lespetitescases/17090119329>.
MLA 8th edition (indexed under "digital media")
Poupeau, Gautier. "Detail de la Main de Dakini Dansante." flickr, 18 Jan. 2015, www.flickr.com/photos/lespetitescases/17090119329.
APA 7th edition (indexed under "audiovisual media")
Poupeau, G. (2015) Detail de la Main de Dakini Dansante [photograph]. Retrieved from http://www.flickr.com/photos/lespetitescases/17090119329.
Chicago Style 16th edition (indexed under "audiovisual materials")
Poupeau, Guatier. "Detail de la Main de Dakini Dansante," January 18, 2015. flickr. http://www.flickr.com/photos/lespetitescases/17090119329.
CSE Style 8th edition (indexed under "websites and other online formats")
Citation-sequence and Citation-name:
Poupeau G. Detail de la Main de Dakini Dansante [image]. Flicker; 2015 Jan 18. [accessed 2018 Oct 2]. http://www.flickr.com/photos/lespetitescases/17090119329.
Name-year
Poupeau G. 2015 Jan 18. Detail de la Main de Dakini Dansante [image]. Flickr; [accessed 2018 Oct 2]. http://www.flickr.com/photos/lespetitescases/17090119329.
APA (7th edition)
MLA Style Center (8th edition)
CSE Citation Style (7th edition)