College Entrance Examination Board. (1931). Examination questions in history (Sixth series, 1926-1930.). Ginn and Co.
芝加哥风格引文College Entrance Examination Board. Examination Questions in History. Sixth series, 1926-1930. Boston: Ginn and Co, 1931.
MLA引文College Entrance Examination Board. Examination Questions in History. Sixth series, 1926-1930. Ginn and Co, 1931.
警告：这些引文格式不一定是100％准确.