Ewing, U. C. (1956). Thresholds of existence: A cosmogony and theory of evolution as away of life. Philosophical Library.
Chicago Style (17th ed.) CitationEwing, Upton Clary. Thresholds of Existence: A Cosmogony and Theory of Evolution as Away of Life. New York: Philosophical Library, 1956.
MLA (9th ed.) CitationEwing, Upton Clary. Thresholds of Existence: A Cosmogony and Theory of Evolution as Away of Life. Philosophical Library, 1956.
Warning: These citations may not always be 100% accurate.