If you're looking for a PDF representation of the Estill Voice Model, you might find the following:
While you can find full scanned copies of the original 1990s Estill manual on some file-sharing sites, these are illegal, often of poor scan quality, and ethically problematic. Moreover, the EVM is a physical practice , not just a theory; reading a bootleg PDF without certified training can lead to vocal strain because you miss the kinesthetic feedback. estill voice model pdf