Gaya APA
Drucker, Peter F.. (1985).
Innovation and entrepreneurship: practice and principles .
America:
Harper Perennial.
Gaya Chicago
Drucker, Peter F..
Innovation and entrepreneurship: practice and principles.
America:
Harper Perennial,
1985.
Text.
Gaya MLA
Drucker, Peter F..
Innovation and entrepreneurship: practice and principles.
America:
Harper Perennial,
1985.
Text.
Gaya Turabian
Drucker, Peter F..
Innovation and entrepreneurship: practice and principles.
America:
Harper Perennial,
1985.
Print.