APA aipamena

(2008). English for the Energy industry ( Kèm theo CD/ 811-12.

Chicago Style aipamena

English for the Energy Industry ( Kèm Theo CD/ 811-12. 2008.

MLA aipamena

English for the Energy Industry ( Kèm Theo CD/ 811-12. 2008.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.