Dyfyniad APA
ebrary, Inc, Spence, M., & Lewis, M. A. (2009). Health and growth. World Bank.
Dyfyniad Arddull Chicago
ebrary, Inc, Michael Spence, and Maureen A. Lewis. Health and Growth. Washington, DC: World Bank, 2009.
Dyfyniad MLA
ebrary, Inc, et al. Health and Growth. World Bank, 2009.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.