APA
Kelly B., National Bureau of Economic Research, Pruitt S. & Su Y. (2018). Characteristics are covariances. Cambridge: NBER.
Chicago
Kelly Bryan, National Bureau of Economic Research, Pruitt Seth and Su Yinan. 2018. Characteristics are covariances. Cambridge: NBER.
Harvard
Kelly B., National Bureau of Economic Research, Pruitt S. and Su Y. (2018). Characteristics are covariances. Cambridge: NBER.
MLA
Kelly Bryan, National Bureau of Economic Research, Pruitt Seth and Su Yinan. Characteristics are covariances. Cambridge: NBER. 2018.