APA (7th ed.) Citation

Yeang, K., & Leong, T. (2017). It's not easy being green (ORO edition.). ORO Editions.

Chicago Style (17th ed.) Citation

Yeang, Ken, and Tuck Leong. It's Not Easy Being Green. ORO edition. Singapore: ORO Editions, 2017.

MLA (9th ed.) Citation

Yeang, Ken, and Tuck Leong. It's Not Easy Being Green. ORO edition. ORO Editions, 2017.