Gaya APA
Rangkuti-Hasibuan, Sofia [Haji].. (1988).
English for specific purposes : economics / H. Sofia Rangkuti-Hasibuan .
Jakarta:
Gramedia.
Gaya Chicago
Rangkuti-Hasibuan, Sofia [Haji]..
English for specific purposes : economics / H. Sofia Rangkuti-Hasibuan.
Jakarta:
Gramedia,
1988.
Text.
Gaya MLA
Rangkuti-Hasibuan, Sofia [Haji]..
English for specific purposes : economics / H. Sofia Rangkuti-Hasibuan.
Jakarta:
Gramedia,
1988.
Text.
Gaya Turabian
Rangkuti-Hasibuan, Sofia [Haji]..
English for specific purposes : economics / H. Sofia Rangkuti-Hasibuan.
Jakarta:
Gramedia,
1988.
Print.