APA aipamena

Nunan, D. (1999). Speak out 2. Singapore: Thomson Asia.

Chicago Style aipamena

Nunan, David. Speak Out 2. Singapore: Thomson Asia, 1999.

MLA aipamena

Nunan, David. Speak Out 2. Singapore: Thomson Asia, 1999.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.