Gaya APA
Manual of Practical Management. (1989).
-:
IRED.
Gaya Chicago
Manual of Practical Management.
.
-:
IRED,
1989.
Text.
Gaya MLA
Manual of Practical Management.
.
-:
IRED,
1989.
Text.
Gaya Turabian
Manual of Practical Management.
-:
IRED,
1989.
Print.