When managing people, do you know where your power comes from?   Adapt your style accordingly, be confident in your source.  See video:




Within the video I talk about the top 5 main sources of power often described within project management.  Expert, Referent, Reward, Legitimate & Coercive.


Below is a good article that further describes these 5 sources of power, however Dr. Stimson also adds two sources that are becoming more mainstream (emerging sources of power), the two new ones include: Information & Connection (networking).  See Link:   Sources of Power - Dr. Stimson

A second set of definitions with a slightly different perspective can be seen at:
Smallbusiness 5 Sources of Power