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