.jaspersen, f. z., .aylward, a. h., & .sumlinski, m. a. (1991). Trends in private investment in developing countries: Statistics for 1970 - 94. World Bank.
Cita Chicago (17th ed.).jaspersen, frederick z., anthony h. .aylward, i mariusz a. .sumlinski. Trends in Private Investment in Developing Countries: Statistics for 1970 - 94. Washington, DC: World Bank, 1991.
Cita MLA (9th ed.).jaspersen, frederick z., et al. Trends in Private Investment in Developing Countries: Statistics for 1970 - 94. World Bank, 1991.
Atenció: Aquestes cites poden no estar 100% correctes.