Dyfyniad APA

(1974). The United Kingdom in 1980. London: Associated Business Programmes.

Dyfyniad Arddull Chicago

The United Kingdom in 1980. London: Associated Business Programmes, 1974.

Dyfyniad MLA

The United Kingdom in 1980. London: Associated Business Programmes, 1974.

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