Gaya APA

Opara, E., Cantwell, J. (2013). Best Practices for Graphic Designers: Color Works (First Edition). Singapura: Page One Publishing Pte Ltd.

Gaya MLA

Opara, Eddie., Cantwell, John. "Best Practices for Graphic Designers: Color Works". First Edition Singapura: Page One Publishing Pte Ltd, 2013. .