GUTH, H. P., & SHNIDER, P. S. (1981). Our world today. D.C. Heath.
芝加哥风格引文GUTH, Hans P., 与 Patricia S. SHNIDER. Our World Today. Lexington: D.C. Heath, 1981.
MLA引文GUTH, Hans P., 与 Patricia S. SHNIDER. Our World Today. D.C. Heath, 1981.
警告：这些引文格式不一定是100％准确.