Bolles, Robert C. Theory of motivation / Robert C. Bolles - 2nd ed. - New York : Harper & Row , 1975 - viii, 568p. : ill. ; 25 cm. - Harper's experimental psychology series . Includes indexes. Bibliography: p. [479]-556. ISBN: 006040793X Subjects--Topical Terms: Motivation (Psychology)Motivation Dewey Class. No.: 330.11 / BOL