Pringle, R. W. (1937). The junior high school: Apsychological approach. McGraw-Hill book company, inc.
芝加哥风格引文Pringle, Ralph W. The Junior High School: Apsychological Approach. New York and London: McGraw-Hill book company, inc, 1937.
MLA引文Pringle, Ralph W. The Junior High School: Apsychological Approach. McGraw-Hill book company, inc, 1937.
警告：这些引文格式不一定是100％准确.