The source for these pronunciation rules are from the 1917 French Textbook:
Pages 15 – 21, and:
This seems to have come out pretty well but you never know if there are mistakes, because I’m the only one that worked on it, and I make mistakes. If you find any, please write to the blog (firstname.lastname@example.org) or make a comment. Thanks.
Don’t forget to review my French Verb Tense and Mood cheat sheet as well: