Tolong jelaskan mengenai Sumber dari Herbert Beerbohm Tree

Gielgud, John. An Actor and His Time, Sidgwick and Jackson, London (1979),

Macqueen-Pope, W. Carriages at eleven: the story of the Edwardian theatre (1947) Carriages at Eleven

Pearson, Hesketh. Gilbert and Sullivan, Penguin Books, Harmondsworth (1950)

Beerbohm, Max. Herbert Beerbohm Tree (1917)

Bingham, H. The great lover: the life and art of Herbert Beerbohm Tree (1979)

Cran, M. Herbert Beerbohm Tree (1907)

Kachur, B. A. Herbert Beerbohm Tree: Shakespearean actor–director, PhD diss., Ohio State University, 1986

Lambert, A. Unquiet Souls: the Indian summer of the British aristocracy, 1880–1918 (1984)

Pearson, H. Beerbohm Tree: his life and laughter (1956)