Gaya APA
English for Specific Purposes Economics. (1986).
Jakarta:
PT Gramedia.
Gaya Chicago
English for Specific Purposes Economics.
cet.2.
Jakarta:
PT Gramedia,
1986.
.
Gaya MLA
English for Specific Purposes Economics.
cet.2.
Jakarta:
PT Gramedia,
1986.
.
Gaya Turabian
English for Specific Purposes Economics.
Jakarta:
PT Gramedia,
1986.
.