Dyfyniad APA

Heller, R. H. (1977). International trade: Theory and empirical evidence. Prentice Hall of India.

Dyfyniad Arddull Chicago

Heller, Robert H. International Trade: Theory and Empirical Evidence. New Delhi: Prentice Hall of India, 1977.

Dyfyniad MLA

Heller, Robert H. International Trade: Theory and Empirical Evidence. Prentice Hall of India, 1977.

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