APA Style
Er, Andrew, Er, Joanne. (2011).
Use of heuristics in problem solving primary 6 .
Singapore:
Educational Publishing House.
Chicago Style
Er, Andrew, Er, Joanne.
Use of heuristics in problem solving primary 6.
Singapore:
Educational Publishing House,
2011.
Text.
MLA Style
Er, Andrew, Er, Joanne.
Use of heuristics in problem solving primary 6.
Singapore:
Educational Publishing House,
2011.
Text.
Turabian Style
Er, Andrew, Er, Joanne.
Use of heuristics in problem solving primary 6.
Singapore:
Educational Publishing House,
2011.
Print.