Powell, P. W., Wolfskill, G., & Palmer, S. H. (1981). Essays on frontiers in world history. University of Texas Press.
Chicagoスタイル(17版)引用形式Powell, Philip Wayne, George Wolfskill, , Stanley H. Palmer. Essays on Frontiers in World History. Austin: University of Texas Press, 1981.
MLA(9版)引用形式Powell, Philip Wayne, et al. Essays on Frontiers in World History. University of Texas Press, 1981.
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