References
Enlow, D.H. (1990). Handbook of Facial Growth (3rd edition). Philadelphia,
Pennsylvania: W.B. Saunders Company.
Moyers, R.E. (1988). Handbook of Orthodontics (4th edition). Chicago, Illinois:
Year Book Medical Publishers, Inc.
Proffit, W.R. (2000). Contemporary Orthodontics (3rd edition). St. Louis,
Missouri: Mosby, Inc.