APA (7th ed.) Citation

Clarke, G. R. G., Groff, A., Walsh, P. P., Keefer, P., & Beck, T. (1999). New Tools and New Tests in Comparative Political Economy: The Database of Political Institutions. The World Bank.

Chicago Style (17th ed.) Citation

Clarke, George R. G., Alberto Groff, Patrick Paul Walsh, Philip Keefer, and Thorsten Beck. New Tools and New Tests in Comparative Political Economy: The Database of Political Institutions. Washington, D.C: The World Bank, 1999.

MLA (8th ed.) Citation

Clarke, George R. G., et al. New Tools and New Tests in Comparative Political Economy: The Database of Political Institutions. The World Bank, 1999.