Perry, D. G. (1984). Brachiopoda and biostratigraphy of the Silurian-Devonian Delorme Formation in the District of Mackenzie, the Yukon. Royal Ontario Museum.
Lua i Stíl Chicago (17ú heag.)Perry, David G. Brachiopoda and Biostratigraphy of the Silurian-Devonian Delorme Formation in the District of Mackenzie, the Yukon. Toronto: Royal Ontario Museum, 1984.
Lua MLA (8ú heag.)Perry, David G. Brachiopoda and Biostratigraphy of the Silurian-Devonian Delorme Formation in the District of Mackenzie, the Yukon. Royal Ontario Museum, 1984.
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