Hersey P & Blanchard K H. 1974. So you want to know your leadership style? Training And Development Journal, 2, 1–15.

Hersey P & Blanchard K H 1982(a). Management of Organisational Behaviour: Utilizing Human Resources, 4th edn Prentice Hall, Englewood Cliffs, New Jersey.

Hersey P & Blanchard K H 1982(b). Grid Principles and Situationalism: Both! A Response to Blake and Mouton. Group and Organizational Studies 6, 207–210.