Gaya APA

Koh, R., Nayak, M. (2005). Green Ladder : A Card for Grandpa / Let's Make a Pinwheel . Singapore: Federal-Marshall Cavendish Education.

Gaya MLA

Koh, Ruth., Nayak, Manisha. "Green Ladder : A Card for Grandpa / Let's Make a Pinwheel". Singapore: Federal-Marshall Cavendish Education, 2005. Text.