Knight, G. W. (1955). The Mutual Flame. Methuen & Co.
Lua i Stíl Chicago (17ú heag.)Knight, G. Wilson. The Mutual Flame. Londres, Inglaterra: Methuen & Co, 1955.
Lua MLA (9ú heag.)Knight, G. Wilson. The Mutual Flame. Methuen & Co, 1955.
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