Dyfyniad APA

Prashant Kumar. (2012). Product design: Creativity concepts and usability. PHI.

Dyfyniad Arddull Chicago

Prashant Kumar. Product Design: Creativity Concepts and Usability. New Delhi: PHI, 2012.

Dyfyniad MLA

Prashant Kumar. Product Design: Creativity Concepts and Usability. PHI, 2012.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.