Gray, J. Stanley. (1954). Psychology applied to human affairs / J. Stanley Gray. New York :: Mc Graw-Hill Book,.
Gray, J. Stanley. Psychology applied to human affairs / J. Stanley Gray. New York :: Mc Graw-Hill Book,, 1954
Gray, J. Stanley. Psychology applied to human affairs / J. Stanley Gray. New York :: Mc Graw-Hill Book,, 1954.