APA-referens (7:e uppl.)
Pyle, L. J., & Barnes, C. R. (2002). Taxonomy, evolution and biostratigraphy of conodonts from the Kechika Formation, Skoki Formation, and Road River Group (Upper Cambrian to Lower Silurian), Northeastern British Columbia. NRC Research Press.
Chicago-referens (17:e uppl.)
Pyle, Leanne J., och Christopher R. Barnes. Taxonomy, Evolution and Biostratigraphy of Conodonts from the Kechika Formation, Skoki Formation, and Road River Group (Upper Cambrian to Lower Silurian), Northeastern British Columbia. Ottawa: NRC Research Press, 2002.
MLA-referens (9:e uppl.)
Pyle, Leanne J., och Christopher R. Barnes. Taxonomy, Evolution and Biostratigraphy of Conodonts from the Kechika Formation, Skoki Formation, and Road River Group (Upper Cambrian to Lower Silurian), Northeastern British Columbia. NRC Research Press, 2002.
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