APA Style
RANGKUTI, Hasibuan Sofia. (1991).
English For Specific Purposes Economics .
Jakarta:
Gramedia Pustaka Utama.
Chicago Style
RANGKUTI, Hasibuan Sofia.
English For Specific Purposes Economics.
Jakarta:
Gramedia Pustaka Utama,
1991.
Text.
MLA Style
RANGKUTI, Hasibuan Sofia.
English For Specific Purposes Economics.
Jakarta:
Gramedia Pustaka Utama,
1991.
Text.
Turabian Style
RANGKUTI, Hasibuan Sofia.
English For Specific Purposes Economics.
Jakarta:
Gramedia Pustaka Utama,
1991.
Print.