Severin, T. (1968). Explorers of the Mississippi ([1st American ed.].). Knopf.
Chicago Style (17th ed.) CitationSeverin, Timothy. Explorers of the Mississippi. [1st American ed.]. New York: Knopf, 1968.
MLA (9th ed.) CitationSeverin, Timothy. Explorers of the Mississippi. [1st American ed.]. Knopf, 1968.
Warning: These citations may not always be 100% accurate.