APA

Ludwig E., Lindsay M. H. [. o. c., . (1939). The Nile: the life-story of a river. New York: Garden City publishing co., inc.

Chicago

Ludwig Emil, Lindsay Mary H [from old catalog], . 1939. The Nile: the life-story of a river. New York: Garden City publishing co., inc.

Harvard

Ludwig E., Lindsay M. H. [. o. c., . (1939). The Nile: the life-story of a river. New York: Garden City publishing co., inc.

MLA

Ludwig Emil, Lindsay Mary H [from old catalog], . The Nile: the life-story of a river. New York: Garden City publishing co., inc. 1939.