APA (7th ed.) Citation

Hasibuan, S. (1986). English For Specific Purposes: Economics. PT Gramedia.

Chicago Style (17th ed.) Citation

Hasibuan, Sofia. English For Specific Purposes: Economics. PT Gramedia, 1986.

MLA (8th ed.) Citation

Hasibuan, Sofia. English For Specific Purposes: Economics. PT Gramedia, 1986.

Warning: These citations may not always be 100% accurate.