For Mobi go here...
https://www.mobileread.com/forums/forumdisplay.php?f=128
Click "New Thread"
Select a prefix
Enter...
Author_surname, Author_firstname (or initials): Book_title. Version. Posting Date
In the subject area enter some info about the book, if you did anything special to the file, etc.
Attach the file where it says "Manage Attachments"
Read through this...
https://www.mobileread.com/forums/showthread.php?t=11634