Greene, G. M. (1930). Two witnesses: A personal recollection of Hubert Parry and Friedrich von Hugel. J.M. Dent ; E.P. Dutton.
Lua i Stíl Chicago (17ú heag.)Greene, Gwendolen Maud. Two Witnesses: A Personal Recollection of Hubert Parry and Friedrich Von Hugel. London : New York: J.M. Dent ; E.P. Dutton, 1930.
Lua MLA (8ú heag.)Greene, Gwendolen Maud. Two Witnesses: A Personal Recollection of Hubert Parry and Friedrich Von Hugel. J.M. Dent ; E.P. Dutton, 1930.
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