APA استشهاد

Spence, M., & Lewis, M. (2009). Health and growth. The World Bank.

استشهاد بنمط شيكاغو

Spence, Michael, و Maureen Lewis. Health and Growth. Washington DC: The World Bank, 2009.

MLA استشهاد

Spence, Michael, و Maureen Lewis. Health and Growth. The World Bank, 2009.