APA aipamena

ADRIAN DOFF. (1997). Language in use Upper - intermediate (0 521 55550 7). Cambridge.

Chicago Style aipamena

ADRIAN DOFF. Language in Use Upper - Intermediate (0 521 55550 7). Cambridge, 1997.

MLA aipamena

ADRIAN DOFF. Language in Use Upper - Intermediate (0 521 55550 7). Cambridge, 1997.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.