Dyfyniad APA

Norman, D. (2007). The design of future things. Basic Books.

Dyfyniad Arddull Chicago

Norman, Donald. The Design of Future Things. New York: Basic Books, 2007.

Dyfyniad MLA

Norman, Donald. The Design of Future Things. Basic Books, 2007.

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