APA aipamena

(2001). More grammar practice. Boston, MA: Heinle & Heinle.

Chicago Style aipamena

More Grammar Practice. Boston, MA: Heinle & Heinle, 2001.

MLA aipamena

More Grammar Practice. Boston, MA: Heinle & Heinle, 2001.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.