Gaya APA
Drucker, Peter F. (1989).
The best of business books .
Hogkong:
World Executive\'s Digest.
Gaya Chicago
Drucker, Peter F.
The best of business books.
Hogkong:
World Executive\'s Digest,
1989.
Monograf.
Gaya MLA
Drucker, Peter F.
The best of business books.
Hogkong:
World Executive\'s Digest,
1989.
Monograf.
Gaya Turabian
Drucker, Peter F.
The best of business books.
Hogkong:
World Executive\'s Digest,
1989.
Monograf.