Krapp, K. M. (1998). Notable twentieth-century scientists: Supplement. Gale Research.
芝加哥风格引文Krapp, Kristine M. Notable Twentieth-century Scientists: Supplement. Detroit: Gale Research, 1998.
MLA引文Krapp, Kristine M. Notable Twentieth-century Scientists: Supplement. Gale Research, 1998.
警告：这些引文格式不一定是100％准确.