APA Style
Drucker, Peter F.. (1999).
Management Challenges for the 21st Century .
Oxford:
Butterworth-Heinemann.
Chicago Style
Drucker, Peter F..
Management Challenges for the 21st Century.
Oxford:
Butterworth-Heinemann,
1999.
Text.
MLA Style
Drucker, Peter F..
Management Challenges for the 21st Century.
Oxford:
Butterworth-Heinemann,
1999.
Text.
Turabian Style
Drucker, Peter F..
Management Challenges for the 21st Century.
Oxford:
Butterworth-Heinemann,
1999.
Print.