Pirie, Peter J. (April 1964). "Scapino. The Development of William Walton". The Musical Times. 105 (1454). The Musical Times, Vol. 105, No. 1454: 258–259. doi:10.2307/949354. JSTOR949354.
Pirie, Peter J. (April 1964). "Scapino. The Development of William Walton". The Musical Times. 105 (1454). The Musical Times, Vol. 105, No. 1454: 258–259. doi:10.2307/949354. JSTOR949354.