APA aipamena

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

Chicago Style aipamena

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

MLA aipamena

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

Kontuz: berrikusi erreferentzia hauek erabili aurretik.