APA aipamena

HASIBUAN, S. R. (1988). English for Specific Purposes: Economics. Gramedia.

Chicago Style aipamena

HASIBUAN, Sofia Rangkuti. English for Specific Purposes: Economics. Gramedia, 1988.

MLA aipamena

HASIBUAN, Sofia Rangkuti. English for Specific Purposes: Economics. Gramedia, 1988.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.