Saitz, R. L., & Stieglitz, F. B. (1978). Challenge: A first reader/workbook in English. Winthrop Publishers.
芝加哥风格引文Saitz, Robert L., 与 Francine B. Stieglitz. Challenge: A First Reader/workbook in English. Cambridge, Mass.: Winthrop Publishers, 1978.
MLA引文Saitz, Robert L., 与 Francine B. Stieglitz. Challenge: A First Reader/workbook in English. Winthrop Publishers, 1978.
警告：这些引文格式不一定是100％准确.