New York, Da Capo Press, 1968

Cleveland : World Publishing Company, 1962
First edition.

Freeport, N.Y. : Books for Libraries Press, 1967

Princeton, N.J., Princeton University Press, 1968

New York : October House, 1966

Cambridge : Harvard University Press, 1956

New York : Da Capo Press & B. Blom, 1965
[Rev. ed.].

Middletown, Conn. : Wesleyan University Press, 1961
[First edition].