Open University (Great Britain). Geology Course Team & Gass, I. G. (1972). Field relations. Open U.P..
芝加哥风格引文Open University (Great Britain). Geology Course Team 与 I. G. Gass. Field Relations. Bletchley: Open U.P., 1972.
MLA引文Open University (Great Britain). Geology Course Team 与 I. G. Gass. Field Relations. Open U.P., 1972.
警告：这些引文格式不一定是100％准确.