Whats the summary of Effects of power to reward and punish in cooperative and competitive contexts by Dean Tjosvold that includes the author's definition of authentic leadership.

Whats the summary of Leadership, Power, Culture, and Ethics in the Transcultural Contextby J. R> Perez and make sure to differentiate between authority and power.

Whats the summary of Power, Interaction, Position, and the Generation of Cultural Agreement in Organization by William B Stevenson and explain the his stance related to leadership research.