Dyfyniad APA

(1976). Technological substitution: Forecasting techniques and applications. New York: Elsevier Pub. Co.

Dyfyniad Arddull Chicago

Technological Substitution: Forecasting Techniques and Applications. New York: Elsevier Pub. Co, 1976.

Dyfyniad MLA

Technological Substitution: Forecasting Techniques and Applications. New York: Elsevier Pub. Co, 1976.

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