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.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPyle, Leanne J., और 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.
एमएलए (9वां संस्करण) प्रशस्ति पत्रPyle, Leanne J., और 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.