2Stanley Sadie,New Grove Music and Musicians Dictionary: Samuel Barber Index, Macmillan Publisher Ltd. 1980.
3Harold Gleason and Warren Becker , 20^th Century American Composers ,Second Edition Revised, 1998.
4Russell E.Friedewald, A Formal and Stylistic Analysis of the Published Music of Samuel Barber. Ph . D .Diss. State University of Iowa, 1957.
5Lawrence S. Wathen, Dissormnce Treatment in the Instrumental Music of Samuel Barber. Ph. D. Diss. Northwestern Univemity, 1960.
6Dean L. Arlton , American Piano Sonatas of the Twentieth Century: Selective Analyses and Annotated Index.Columbia University, 1968. (Sonatas by Barber, Carter,Dello Joio, Griffes, Ives, Persichetti and Thomson).
7The American Composers Series Samuel Barber :Complete Piano Music, G. Schirmer New York, London.
8Samuel Barber ( 1910-1981) Complete Published Solo Piano Music, Daniel Pollack, Piano Recorded at Fischer Hall, Santa Rosa, California, from 10^th to 12^th April,1995. Producers: Marina and Victor Ledin,Publisher: G.Schirmer & Co.
