APA Style
Drucker, Peter F.. (2005).
Management challeges for the 21 St century .
Boston:
Elsevier.
Chicago Style
Drucker, Peter F..
Management challeges for the 21 St century.
Boston:
Elsevier,
2005.
Buku.
MLA Style
Drucker, Peter F..
Management challeges for the 21 St century.
Boston:
Elsevier,
2005.
Buku.
Turabian Style
Drucker, Peter F..
Management challeges for the 21 St century.
Boston:
Elsevier,
2005.
Buku.