Gaya APA
Drucker, Peter F.. (1967).
The effective executive (1).
London:
Pan Book.
Gaya Chicago
Drucker, Peter F..
The effective executive.
1
London:
Pan Book,
1967.
Text.
Gaya MLA
Drucker, Peter F..
The effective executive.
1
London:
Pan Book,
1967.
Text.
Gaya Turabian
Drucker, Peter F..
The effective executive.
1
London:
Pan Book,
1967.
Print.