Duncan, S., & Gull, C. A. E. R. (1911). The complete wildfowler. G. Richards, ltd.
Lua i Stíl Chicago (17ú heag.)Duncan, Stanley, agus Cyril Arthur Edward Ranger Gull. The Complete Wildfowler. London: G. Richards, ltd, 1911.
Lua MLA (8ú heag.)Duncan, Stanley, agus Cyril Arthur Edward Ranger Gull. The Complete Wildfowler. G. Richards, ltd, 1911.
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