APA Style
Drucker, Peter F.. (1999).
Management challenges for the 21st century .
New York:
Harper Business.
Chicago Style
Drucker, Peter F..
Management challenges for the 21st century.
New York:
Harper Business,
1999.
Printed Material.
MLA Style
Drucker, Peter F..
Management challenges for the 21st century.
New York:
Harper Business,
1999.
Printed Material.
Turabian Style
Drucker, Peter F..
Management challenges for the 21st century.
New York:
Harper Business,
1999.
Printed Material.