Gaya APA
Drucker, Peter F. (2008).
Managing Oneself .
United State America:
Bostn.
Gaya Chicago
Drucker, Peter F.
Managing Oneself.
United State America:
Bostn,
2008.
Text.
Gaya MLA
Drucker, Peter F.
Managing Oneself.
United State America:
Bostn,
2008.
Text.
Gaya Turabian
Drucker, Peter F.
Managing Oneself.
United State America:
Bostn,
2008.
Print.