Collis, G. R. (1994). The tattered eagle. The Pentland Press Limited.
Lua i Stíl Chicago (17ú heag.)Collis, Geoffrey Rex. The Tattered Eagle. Durham, [England]: The Pentland Press Limited, 1994.
Lua MLA (9ú heag.)Collis, Geoffrey Rex. The Tattered Eagle. The Pentland Press Limited, 1994.
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