• Deardorff's Glossary of International Economics, search for real • R. O'Donnell (1987). "real and nominal quantities," The New Palgrave: A Dictionary of Economics, v. 4, pp. 97-98.
Potůček, Martin (1999). Not Only the Market: The Role of the Market, Government, and the Civic Sector. New York: Central European University Press. s. 34. ISBN 0-585-31675-9. OCLC45729878.