Vocal Fitness Training's Teach Yourself to Sing!: 20 Singing Lessons to Improve Your Voice (Book, Online Audio, Instructional Videos and Interactive Practice Plans)

Vocal Fitness Training's Teach Yourself to Sing!: 20 Singing Lessons to Improve Your Voice (Book, Online Audio, Instructional Videos and Interactive Practice Plans)

Find Your Own Singing Voice: Vocal Training from Fundamentals to Mastery, Techniques to Help You Enjoy Singing More and More

Singing 101: Vocal Basics and Fundamental Singing Skills for All Styles and Abilities (How to Sing)