Gaya APA
Harper Collins Publisher College Division Catalog 1994. (1994).
Singapore:
Harper Collins.
Gaya Chicago
Harper Collins Publisher College Division Catalog 1994.
.
Singapore:
Harper Collins,
1994.
Text.
Gaya MLA
Harper Collins Publisher College Division Catalog 1994.
.
Singapore:
Harper Collins,
1994.
Text.
Gaya Turabian
Harper Collins Publisher College Division Catalog 1994.
Singapore:
Harper Collins,
1994.
Print.