Gaya APA
Training Manual Engine Group. (1999).
:
Prentice Hall.
Gaya Chicago
Training Manual Engine Group.
.
:
Prentice Hall,
1999.
Text.
Gaya MLA
Training Manual Engine Group.
.
:
Prentice Hall,
1999.
Text.
Gaya Turabian
Training Manual Engine Group.
:
Prentice Hall,
1999.
Print.