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Baltimore : Johns Hopkins University Press, 1979

Durham, N.C. : Duke University Press, 1975

London : Totowa, N.J. : J.M. Dent ; Rowman & Littlefield, 1974

Boston : Twayne, 1985

Carbondale, Southern Illinois University Press 1966

New York : Twayne Publishers, 1974

[Pittsburgh] : University of Pittsburgh Press, 1975

New York : Oxford University Press, 1970

Englewood Cliffs, N.J. : Prentice-Hall, 1966

Cambridge, Massachusetts. : Harvard University Press, 1958

New York : Barnes & Noble, 1976

London ; New York : Methuen, 1982

Cambridge, Belknap Press of Harvard University Press, 1965

Englewood Cliffs, N.J. : Prentice-Hall, 1972

New York, Twayne Publishers 1968

Troy, N.Y. : Whitston Pub. Co., 1993

DeKalb : Northern Illinois University Press, 1972

Englewood Cliffs, N.J. : Prentice-Hall, 1980

Princeton, N.J., Princeton University Press, 1965