Dyfyniad APA

Norman, C. (1978). Soft technologies, hard choices. Worldwatch Institute.

Dyfyniad Arddull Chicago

Norman, Colin. Soft Technologies, Hard Choices. [Washington]: Worldwatch Institute, 1978.

Dyfyniad MLA

Norman, Colin. Soft Technologies, Hard Choices. Worldwatch Institute, 1978.

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