Geological Society of America & Legget, R. F. (1982). Geology under cities. Geological Society of America.
芝加哥风格引文Geological Society of America 与 Robert Ferguson Legget. Geology Under Cities. Boulder, Colo.: Geological Society of America, 1982.
MLA引文Geological Society of America 与 Robert Ferguson Legget. Geology Under Cities. Geological Society of America, 1982.
警告：这些引文格式不一定是100％准确.