APA Style
Er, Andrew. (2004).
Mathematics Challenging Problems Primary 3 .
Singapore:
Educational Publishing House.
Chicago Style
Er, Andrew.
Mathematics Challenging Problems Primary 3.
Singapore:
Educational Publishing House,
2004.
Text.
MLA Style
Er, Andrew.
Mathematics Challenging Problems Primary 3.
Singapore:
Educational Publishing House,
2004.
Text.
Turabian Style
Er, Andrew.
Mathematics Challenging Problems Primary 3.
Singapore:
Educational Publishing House,
2004.
Print.