Wagner, Rodd. 12 : the elements of great managing / - 1st ed. - New York, NY : Gallup Press, c2006. - xvii, 235 pages : Illustrations ; Includes source notes. ISBN: 159562998X (9781595629982 : alk. paper) Subjects--Topical Terms: Executive ability.Management. LC Class. No.: HD 38.2 / WAG