Thrapp, D. L. (1994). Encyclopedia of frontier biography. Arthur H. Clark Co..
Chicago Style (17th ed.) CitationThrapp, Dan L. Encyclopedia of Frontier Biography. Spokane, WA: Arthur H. Clark Co., 1994.
MLA引文Thrapp, Dan L. Encyclopedia of Frontier Biography. Arthur H. Clark Co., 1994.
警告:這些引文格式不一定是100%准確.