R.R. Bowker Company. Books in print. R.R. Bowker Co.
Cita Chicago (17th ed.)R.R. Bowker Company. Books in Print. New York: R.R. Bowker Co.
Cita MLA (8th ed.)R.R. Bowker Company. Books in Print. R.R. Bowker Co.
Atenció: Aquestes cites poden no estar 100% correctes.