APA Style
Hasibuan, Sofia Rangkuti. (1998).
English Serial 1: ECONOMICS (Revisi).
Jakarta:
Djambatan.
Chicago Style
Hasibuan, Sofia Rangkuti.
English Serial 1: ECONOMICS.
Revisi
Jakarta:
Djambatan,
1998.
Text.
MLA Style
Hasibuan, Sofia Rangkuti.
English Serial 1: ECONOMICS.
Revisi
Jakarta:
Djambatan,
1998.
Text.
Turabian Style
Hasibuan, Sofia Rangkuti.
English Serial 1: ECONOMICS.
Revisi
Jakarta:
Djambatan,
1998.
Print.