APA Style
Yam, Peter. (2008).
Primary Level Grammar & Usage Book 4 .
Singapore:
SAP.
Chicago Style
Yam, Peter.
Primary Level Grammar & Usage Book 4.
Singapore:
SAP,
2008.
Text.
MLA Style
Yam, Peter.
Primary Level Grammar & Usage Book 4.
Singapore:
SAP,
2008.
Text.
Turabian Style
Yam, Peter.
Primary Level Grammar & Usage Book 4.
Singapore:
SAP,
2008.
Print.