Παραπομπή APA

Levin, J. V. (1960). Export economies: Their pattern of development in historical perspective. Harvard.

Παραπομπή Chicago Style

Levin, Jonathan V. Export Economies: Their Pattern of Development in Historical Perspective. Combridge: Harvard, 1960.

Παραπομπή MLA

Levin, Jonathan V. Export Economies: Their Pattern of Development in Historical Perspective. Harvard, 1960.