I use MIT licensed library in program when I publish it how do I create copyright notice for it because I already created LICENSE.md file with license for my project. Note: I didn't edit libraries code I only used it.
In the binary, it's common practise to display the credits in an 'About' section or similar. There you list your programme (version) with credits and license and the names and licenses of the libraries.
See for instance this keepass page as example where the about section is put online on a webpage.
As for your source distribution you likely don't need to change anything: you have your license on your code, the libraries on theirs - irrespective whether you have them inside your repository (then the complete code incl. their license) or not as part of your repo at all.
As uaual: I'm not a layer, take my word with a grain of salt :)
If your program just uses the library, it should be enough to state in your README file that it is being used (and give a --hopefully reliable-- address where to get it, state it's license for potential users of your code with e.g. terminal GNU allergy) and perhaps give instructions to do so in INSTALLING.
Doing so has the advantage that users can benefit from any library updates (might add somewhere "tested with libxyz version 0.0.95" or so), perhaps use the version already installed (by their distribution? for other packages using it?)