Frahm, R., & Covington, J. (1979). What's happening in minimum competency testing. Phi Delta Kappa.
芝加哥风格引文Frahm, Robert, 与 Jimmie Covington. What's Happening in Minimum Competency Testing. Bloomington, Ind.: Phi Delta Kappa, 1979.
MLA引文Frahm, Robert, 与 Jimmie Covington. What's Happening in Minimum Competency Testing. Phi Delta Kappa, 1979.
警告：这些引文格式不一定是100％准确.