APA (7th ed.) Citation

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 (9th ed.) Citation

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