1. A brief history of orthodontics;Asbell;Am J Orthod Dentofacial Orthop,1990
2. A summer's day in June;Shankland,1971
3. Orthodontic education and literature;Lischer,1955
4. Merriam-Webster's Dictionary. Available at: www.meriamwebster.com. Accessed September 20, 2014.
5. The ethics of orthodontic patients;Dewey;Int J Orthod,1918