Kleiner, M. M. (2006). Licensing occupations: Ensuring quality or restricting competition? W.E. Upjohn Institute for Employment Research.
芝加哥风格引文Kleiner, Morris M. Licensing Occupations: Ensuring Quality or Restricting Competition? Kalamazoo, Mich.: W.E. Upjohn Institute for Employment Research, 2006.
MLA引文Kleiner, Morris M. Licensing Occupations: Ensuring Quality or Restricting Competition? W.E. Upjohn Institute for Employment Research, 2006.
警告：这些引文格式不一定是100％准确.