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