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