APA Citation

Gan, & Heng. (1999). Pack and stack. Singapore: Earlybird Books.

Chicago Style Citation

Gan, and Heng. Pack and Stack. Singapore: Earlybird Books, 1999.

MLA Citation

Gan, and Heng. Pack and Stack. Singapore: Earlybird Books, 1999.

Warning: These citations may not always be 100% accurate.