Assuming steve is required, and roberson is required, the following result was found.
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Motivational Leadership Theories Applied to Music Pedagogy
p. 58. 47Luthans, pp. 376-377. 48Ibid., p. 381. 49Stuart-Kotze, pp. 232-233. 50Ibid., p. 99. 51Ibid., p. 91. authors: Steve Roberson author_ids: 1257 authors: Steve Roberson author_ids: 1257