Gaya APA
Grolier Advanced English Course Guide. (2004).
Malaysia:
Grolier Incorporated.
Gaya Chicago
Grolier Advanced English Course Guide.
.
Malaysia:
Grolier Incorporated,
2004.
Buku.
Gaya MLA
Grolier Advanced English Course Guide.
.
Malaysia:
Grolier Incorporated,
2004.
Buku.
Gaya Turabian
Grolier Advanced English Course Guide.
Malaysia:
Grolier Incorporated,
2004.
Buku.