Bird, Doni L. Torres and ehrlich modern dental assisting / Doni L. Bird, Debbie S. Robinson. - 9th ed. - St. Louis, MO : Saunders, an imprint of Elsevier Inc., 2008. - p. cm. ISBN: 9781416042457 (hardcover : alk. paper) LCCN: 2007930274 LC Class. No.: RK60.5 Dewey Class. No.: 617.6/0233