APA Style
Oei, Chay Hoon. (1999).
Add & Subtract .
United Kingdom:
Educational Publishing House.
Chicago Style
Oei, Chay Hoon.
Add & Subtract.
United Kingdom:
Educational Publishing House,
1999.
.
MLA Style
Oei, Chay Hoon.
Add & Subtract.
United Kingdom:
Educational Publishing House,
1999.
.
Turabian Style
Oei, Chay Hoon.
Add & Subtract.
United Kingdom:
Educational Publishing House,
1999.
.