1) House's Path Goal Theory (1971)
2) Hersey and Blanchard's Situational Leadership Theory (1977)
3) Kerr and Jermier's Leadership Substitute Ideas (1978)
4) Yukl's Multiple-Linkage Model (1989)
5) Fiedler and Garcia's Cognitive Resource Theory (1987)
Discuss what is known about the theory from a research perspective. Do we know whether the ideas work or not? Are there any practical "strategic" recommendations for leaders based on that theory? Be sure to cite your sources using APA style.