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