APA (7th ed.) Citation

Engel, C. (1989). Conditional mean-variance efficiency of the U.S. stock market. National Bureau of Economic Research.

Chicago Style (17th ed.) Citation

Engel, Charles. Conditional Mean-variance Efficiency of the U.S. Stock Market. Cambridge, Mass: National Bureau of Economic Research, 1989.

MLA (9th ed.) Citation

Engel, Charles. Conditional Mean-variance Efficiency of the U.S. Stock Market. National Bureau of Economic Research, 1989.