APA (7th ed.) Citation

Guiso, L., Sapienza, P., & Zingales, L. (2002). People's opium?: Religion and economic attitudes. National Bureau of Economic Research.

Chicago Style (17th ed.) Citation

Guiso, Luigi, Paola Sapienza, and Luigi Zingales. People's Opium?: Religion and Economic Attitudes. Cambridge, Mass: National Bureau of Economic Research, 2002.

MLA (9th ed.) Citation

Guiso, Luigi, et al. People's Opium?: Religion and Economic Attitudes. National Bureau of Economic Research, 2002.