Wales, Charles E. The guided design approach Charles E. Wales and Robert A. Stager. - Englewood Cliffs, N.J. Educational Technology Publications c1978. - xiii, 80 p. 24 cm. - The Instructional design library v. 9 . 920319 Bibliography: p. 75-78. ISBN: 0877781133 LCCN: 77027457 Subjects--Topical Terms: Programmed InstructionIndividualized instruction LC Class. No.: LB1028.46 / .W34 Dewey Class. No.: 371.39/442