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Issues in operationalizing and comparing leadership constructs
Graen, George, (2010)
The discriminant validity of transformational and transactional leadership : a multitrait-multimethod analysis of and norms for the German Transformational Leadership Inventory (TLI)
Krüger, Claudia, (2011)
The relative impact of complementary leader behaviors: Which matter most?
Piccolo, Ronald F., (2012)