Gaya APA
Drucker, Peter F.. (2002).
Management Challenges for the 21st Century (edition published).
New York:
perfectbound.
Gaya Chicago
Drucker, Peter F..
Management Challenges for the 21st Century.
edition published
New York:
perfectbound,
2002.
MM.
Gaya MLA
Drucker, Peter F..
Management Challenges for the 21st Century.
edition published
New York:
perfectbound,
2002.
MM.
Gaya Turabian
Drucker, Peter F..
Management Challenges for the 21st Century.
edition published
New York:
perfectbound,
2002.
MM.