एपीए उद्धरण

Heller, H. R. International Trade: Theory and Empirical Evidence.

शिकागो स्टाइल उद्धरण

Heller, H. Robert. International Trade: Theory and Empirical Evidence. :.

एमएलए उद्धरण

Heller, H. Robert. International Trade: Theory and Empirical Evidence.