Gaya APA
Economics: English For Spesific Purpose. (1991).
Jakarta:
PT. Gramedia Pustaka Utama.
Gaya Chicago
Economics: English For Spesific Purpose.
Cet. 3.
Jakarta:
PT. Gramedia Pustaka Utama,
1991.
.
Gaya MLA
Economics: English For Spesific Purpose.
Cet. 3.
Jakarta:
PT. Gramedia Pustaka Utama,
1991.
.
Gaya Turabian
Economics: English For Spesific Purpose.
Jakarta:
PT. Gramedia Pustaka Utama,
1991.
.