एपीए उद्धरण

Levin, J. V. (1960). Export Economics Their pattern of Development in Historical Persspective.

शिकागो स्टाइल उद्धरण

Levin, Jonathan V. Export Economics Their Pattern of Development in Historical Persspective. :, 1960.

एमएलए उद्धरण

Levin, Jonathan V. Export Economics Their Pattern of Development in Historical Persspective. 1960.