Thrapp, D. L. (1988). Encyclopedia of frontier biography. A.H. Clark Co..
Chicago Style (17th ed.) CitationThrapp, Dan L. Encyclopedia of Frontier Biography. Glendale, Calif.: A.H. Clark Co., 1988.
MLA引文Thrapp, Dan L. Encyclopedia of Frontier Biography. A.H. Clark Co., 1988.
警告:這些引文格式不一定是100%准確.