Gaya APA
Erskine, Robert. (1991).
Business management .
New York:
Prentice Hall.
Gaya Chicago
Erskine, Robert.
Business management.
New York:
Prentice Hall,
1991.
Text.
Gaya MLA
Erskine, Robert.
Business management.
New York:
Prentice Hall,
1991.
Text.
Gaya Turabian
Erskine, Robert.
Business management.
New York:
Prentice Hall,
1991.
Print.