Gaya APA
Drucker, Peter F.. (1986).
Innovation and entrepreneurship : practice and principles .
New York:
Harper & Row.
Gaya Chicago
Drucker, Peter F..
Innovation and entrepreneurship : practice and principles.
New York:
Harper & Row,
1986.
Text.
Gaya MLA
Drucker, Peter F..
Innovation and entrepreneurship : practice and principles.
New York:
Harper & Row,
1986.
Text.
Gaya Turabian
Drucker, Peter F..
Innovation and entrepreneurship : practice and principles.
New York:
Harper & Row,
1986.
Print.