Chambers, Colin, "Psychic Energy," in Plays and Players, Vol 27, No 5, February 1980, pp. 11-13.

Chambers includes comments from Shaffer on his plays, including Amadeus.

Connell, Brian, "The Two Sides of Theatre's Agonized Perfectionist," in Times (London), April28, 1980, p. 18.

Connell interviews Shaffer on several topics including his literary development and the structure of his plays.

Taylor, John Russell, Peter Shaffer, Longman Group, 1974

Taylor analyzes Shaffer's use of language in his plays.

Toynbee, Polly, Review, in Spectator, Vol 243, No. 7896, November 10, 1979, pp 29-30.

Toynbee comments on the structure of Amadeus. She praises the play's opening premise but faults what she considers its overlong second act