Cita APA (7th ed.)

Ward, W. A., Deren, B. J., & D'Silva, E. H. (1991). The economics of project analysis: A practitioner's guide. World Bank.

Cita Chicago (17th ed.)

Ward, William A., Barry J. Deren, i Emmanuel H. D'Silva. The Economics of Project Analysis: A Practitioner's Guide. Washington, D.C: World Bank, 1991.

Cita MLA (9th ed.)

Ward, William A., et al. The Economics of Project Analysis: A Practitioner's Guide. World Bank, 1991.