APA
Richardson E. R., . (1979). Periodontal diseases in children and adolescents: state of the art. Nashville: Meharry Medical College.
Chicago
Richardson Elisha R, . 1979. Periodontal diseases in children and adolescents: state of the art. Nashville: Meharry Medical College.
Harvard
Richardson E. R., . (1979). Periodontal diseases in children and adolescents: state of the art. Nashville: Meharry Medical College.
MLA
Richardson Elisha R, . Periodontal diseases in children and adolescents: state of the art. Nashville: Meharry Medical College. 1979.