एपीए उद्धरण

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

शिकागो स्टाइल उद्धरण

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

एमएलए उद्धरण

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