Παραπομπή APA

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

Παραπομπή Chicago Style

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

Παραπομπή MLA

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