APA引文

Powell, P. W., Wolfskill, G., & Palmer, S. H. (1981). Essays on frontiers in world history. University of Texas Press.

Chicago Style (17th ed.) Citation

Powell, Philip Wayne, George Wolfskill, and Stanley H. Palmer. Essays on Frontiers in World History. Austin: University of Texas Press, 1981.

MLA引文

Powell, Philip Wayne, et al. Essays on Frontiers in World History. University of Texas Press, 1981.