APA
Basak G. K., Ma Tongshu, Jagannathan Ravi & National Bureau Of Economic Research. (2004). Assessing the risk in sample minimum risk portfolios. Cambridge, MA: NBER.
Chicago
Basak Gopal K, Ma Tongshu, Jagannathan Ravi and National Bureau Of Economic Research. 2004. Assessing the risk in sample minimum risk portfolios. Cambridge, MA: NBER.
Harvard
Basak G. K., Ma Tongshu, Jagannathan Ravi and National Bureau Of Economic Research. (2004). Assessing the risk in sample minimum risk portfolios. Cambridge, MA: NBER.
MLA
Basak Gopal K, Ma Tongshu, Jagannathan Ravi and National Bureau Of Economic Research. Assessing the risk in sample minimum risk portfolios. Cambridge, MA: NBER. 2004.