Gaya APA
Drucker, Peter F.. (1970).
The Effective Executive. .
London:
Pan Books.
Gaya Chicago
Drucker, Peter F..
The Effective Executive..
London:
Pan Books,
1970.
Text.
Gaya MLA
Drucker, Peter F..
The Effective Executive..
London:
Pan Books,
1970.
Text.
Gaya Turabian
Drucker, Peter F..
The Effective Executive..
London:
Pan Books,
1970.
Print.