Clarke, David (August 1993). "Tippett in and out of 'Those Twentieth Century Blues': The Context and Significance of an Autobiography". Music & Letters. 74 (3): 399–491. doi:10.1093/ml/74.3.399. JSTOR736284. (subscription required)
Driver, Paul; Revill, David (10 January 1998). "Obituary: Sir Michael Tippett". The Independent. Archived from the original on 14 May 2022. Retrieved 16 June 2016.
Driver, Paul; Revill, David (10 January 1998). "Obituary: Sir Michael Tippett". The Independent. Archived from the original on 14 May 2022. Retrieved 16 June 2016.
Tippett, Michael (May 1978). ""Back to Methuselah" and "The Ice Break"". The Shaw Review. 21 (2). Penn State University Press: 100–103. JSTOR40682521. (subscription required)
William Mann, The Times 8 July 1977, quoted in Tippett, Michael (May 1978). ""Back to Methuselah" and "The Ice Break"". The Shaw Review. 21 (2). Penn State University Press: 100–103. JSTOR40682521. (subscription required)
Driver, Paul (June 1984). "First Performances: "The Mask of Time"". Tempo. New Series. 149: 39–44. JSTOR945085. (subscription required)
Clarke, David (August 1993). "Tippett in and out of 'Those Twentieth Century Blues': The Context and Significance of an Autobiography". Music & Letters. 74 (3): 399–491. doi:10.1093/ml/74.3.399. JSTOR736284. (subscription required)
Tippett: Introduction, The Mask of Time, quoted in Clarke, David. "Tippett, Sir Michael (Kemp)". Grove Music Online. Retrieved 26 August 2013. (subscription required)