„Columbia Lake”. Canadian Geographical Names Data Base. Natural Resources Canada. 2015. Архивирано из оригинала 30. 9. 2015. г. Приступљено 29. 9. 2015.
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Marsh, James H. (2013). „Columbia River”. The Canadian Encyclopedia. Historica Foundation. Архивирано из оригинала 22. 9. 2015. г. Приступљено 30. 9. 2015.
According to the United States Geological Survey fact sheet, "Largest Rivers in the United States"Архивирано 2017-07-09 на сајту Wayback Machine, "Rivers are considered large on the basis of one or more of three characteristics: total length from source to mouth, area of basin (watershed) drained by the stream, and average rate of flow (discharge) at the mouth." The Columbia is the largest river of the Pacific Northwest in all three senses.
„Columbia Lake”. Canadian Geographical Names Data Base. Natural Resources Canada. 2015. Архивирано из оригинала 30. 9. 2015. г. Приступљено 29. 9. 2015.
Marsh, James H. (2013). „Columbia River”. The Canadian Encyclopedia. Historica Foundation. Архивирано из оригинала 22. 9. 2015. г. Приступљено 30. 9. 2015.
According to the United States Geological Survey fact sheet, "Largest Rivers in the United States"Архивирано 2017-07-09 на сајту Wayback Machine, "Rivers are considered large on the basis of one or more of three characteristics: total length from source to mouth, area of basin (watershed) drained by the stream, and average rate of flow (discharge) at the mouth." The Columbia is the largest river of the Pacific Northwest in all three senses.