Gaya APA
Drucker, Peter F.. (1985).
The effective executive:the definitive guide to getting the right things done/ Peter F.Drucker .
New York:
Collins Publisher.
Gaya Chicago
Drucker, Peter F..
The effective executive:the definitive guide to getting the right things done/ Peter F.Drucker.
New York:
Collins Publisher,
1985.
Text.
Gaya MLA
Drucker, Peter F..
The effective executive:the definitive guide to getting the right things done/ Peter F.Drucker.
New York:
Collins Publisher,
1985.
Text.
Gaya Turabian
Drucker, Peter F..
The effective executive:the definitive guide to getting the right things done/ Peter F.Drucker.
New York:
Collins Publisher,
1985.
Print.