This assignment is a study of organisational behaviour, including leadership theories such as Path-Goal Theory, Motivational Theories, and Handy's Model of Organisational Culture. It also covers Tuckman's stages of team development and Raven and French Model of organisational Power. The study examines the impact of workplace spirituality dimensions on organisational citizenship behaviour among nurses, employee green behaviour, and pro-environmental behaviour change. Various sources such as journals, books, and online resources are referenced to provide a comprehensive analysis of organisational behaviour and leadership.