APA
Feldman S., Scharfstein David & National Bureau Of Economic Research. (1998). Managed care and provider volume. Cambridge, MA: NBER.
Chicago
Feldman Sarah, Scharfstein David and National Bureau Of Economic Research. 1998. Managed care and provider volume. Cambridge, MA: NBER.
Harvard
Feldman S., Scharfstein David and National Bureau Of Economic Research. (1998). Managed care and provider volume. Cambridge, MA: NBER.
MLA
Feldman Sarah, Scharfstein David and National Bureau Of Economic Research. Managed care and provider volume. Cambridge, MA: NBER. 1998.