Hugh D. Young,Roger A. Freedman
(9)
Roger LeRoy Miller/ Gaylord A. Jentz
(5)
Roger Pierangelo/ George A. Giuliani
(5)
Stephen R. Covey/ A. Roger Merrill/ Rebecca R. Merrill
(5)
Hugh D. Young/ Roger A. Freedman
(3)
Roger A. (California State University Arnold San Marcos)
(3)