Gaya APA
Drucker, Peter F. (1985).
Innovation and entrepreneurship : practice and principles .
New York:
Harper.
Gaya Chicago
Drucker, Peter F.
Innovation and entrepreneurship : practice and principles.
New York:
Harper,
1985.
Buku.
Gaya MLA
Drucker, Peter F.
Innovation and entrepreneurship : practice and principles.
New York:
Harper,
1985.
Buku.
Gaya Turabian
Drucker, Peter F.
Innovation and entrepreneurship : practice and principles.
New York:
Harper,
1985.
Buku.