Gaya APA
Hasibuan, H. Sofia Rangkuti. (1986).
English For Specific Purposes Economic (Cet. 2).
Jakarta:
Gramedia..
Gaya Chicago
Hasibuan, H. Sofia Rangkuti.
English For Specific Purposes Economic.
Cet. 2
Jakarta:
Gramedia.,
1986.
Text.
Gaya MLA
Hasibuan, H. Sofia Rangkuti.
English For Specific Purposes Economic.
Cet. 2
Jakarta:
Gramedia.,
1986.
Text.
Gaya Turabian
Hasibuan, H. Sofia Rangkuti.
English For Specific Purposes Economic.
Cet. 2
Jakarta:
Gramedia.,
1986.
Print.