Thank you @cessarespinozaa for finally taking out time to respond. Regarding your concern, kindly note that the above mentioned image is copyright-free and as such doesn't need any sort of permission or credits. For ownership-free content, whose ownership is untraceable., a credit can not be given to their owners anyway. I've a right to not to give any credits for such content that are copyright-free. The absence of any citation of source or sources does not in any way whatsoever,imply any copyright violations. If you have any doubt, do your own research and gather some proof on the contrary before coming up with such baseless allegations or apprehensions.

On the basis of your argument, I can very well say that your own comment here might be violating some third party copyright authorship through its misusage by missing or inappropriately provided citations, sources, credits, licenses, reusing rights or else. Why don't you provide any source, citation or declaration that the text written by you is your own or from somewhere else and is being used here with due permissions?