Definition of management from different authors?

1.Mary Parker Follet,
"management is the art of getting things done through others"

2.Henry Fayol'
"to manage is to forecast and to plan,organize,to command,to co-ordinate and to control"

3.Louis allen,
"management is what a manager does"

4.American Marketing Association,
"management is guiding human and physical resources into dynamic organizational units which attain their objectives to the satisfaction of those served within a high degree of moral and sense of attainment on the part of those rendering services"

5.Michael Nolty-CPA,
"management is the process of getting activities completed efficiently with and through other people"