REFERENCES
- Evans, Bergen and Cornelia Evans. 1957. A dictionary of contemporary American usage. New York: Random House.
- Kufner, Herbert L. 1962. The grammatical structures of English and German. Chicago: The University of Chicago Press.
- Mager, Nathan H. and Sylvia K. Mager. 1974. Encyclopedic dictionary of English usage. Englewood Cliffs, New Jersey: Prentice Hall.
- Morris, William and Mary Morris. 1975. Harper dictionary of contemporary usage. New York: Harper and Row.
- Oxford English dictionary, the compact edition. 1971. New York: Oxford University Press.