Gaya APA
ESP: State of the Art. (1988).
Singapore:
SEAMEO.
Gaya Chicago
ESP: State of the Art.
.
Singapore:
SEAMEO,
1988.
Buku.
Gaya MLA
ESP: State of the Art.
.
Singapore:
SEAMEO,
1988.
Buku.
Gaya Turabian
ESP: State of the Art.
Singapore:
SEAMEO,
1988.
Buku.