एपीए उद्धरण

Heller, H. R. (1977). International trade/2e: Theory and empirical evidence (2nd ed.). Prentice Hall of India.

शिकागो स्टाइल उद्धरण

Heller, H. Robert. International Trade/2e: Theory and Empirical Evidence. 2nd ed. New Delhi: Prentice Hall of India, 1977.

एमएलए उद्धरण

Heller, H. Robert. International Trade/2e: Theory and Empirical Evidence. 2nd ed. Prentice Hall of India, 1977.