Gaya APA
Rangkuti Hasibuan, Sofia. (1990).
English for spesific purposes : agriculture .
Jakarta:
Gramedia Pustaka Utama.
Gaya Chicago
Rangkuti Hasibuan, Sofia.
English for spesific purposes : agriculture.
Jakarta:
Gramedia Pustaka Utama,
1990.
Text.
Gaya MLA
Rangkuti Hasibuan, Sofia.
English for spesific purposes : agriculture.
Jakarta:
Gramedia Pustaka Utama,
1990.
Text.
Gaya Turabian
Rangkuti Hasibuan, Sofia.
English for spesific purposes : agriculture.
Jakarta:
Gramedia Pustaka Utama,
1990.
Print.