APA Style
Nunan, David. (1999).
Speak Out 1 .
Singapore:
Thomson Asia ELT.
Chicago Style
Nunan, David.
Speak Out 1.
Singapore:
Thomson Asia ELT,
1999.
Text.
MLA Style
Nunan, David.
Speak Out 1.
Singapore:
Thomson Asia ELT,
1999.
Text.
Turabian Style
Nunan, David.
Speak Out 1.
Singapore:
Thomson Asia ELT,
1999.
Print.