Boas, Franz. (1928). ''Bella Bella texts''. Columbia University contributions to anthropology (No. 5).
Boas, Franz. (1932. ''Bella Bella tales''. Memoirs of the American Folklore Society (No. 25).
Howe, Darin M. (2000). Oowekyala segmental phonology. (Doctoral dissertation, University of Ottawa).
Mithun, Marianne. (1999). ''The languages of Native North America''. Cambridge: Cambridge University Press. ISBN 0-521-23228-7 (hbk); ISBN 0-521-29875-X.
Poser, William J. (2003). The status of documentation for British Columbia native languages. Yinka Dene Language Institute Technical Report (No. 2). Vanderhoof, British Columbia: Yinka Dene Language Institute.
Rath, John C. (1981). ''A practical Heiltsuk-English dictionary with a grammatical introduction''. Mercury Series paper, Canadian Ethnology Service, (No. 75). Ottawa: National Museums of Canada.
Windsor, Evelyn W. (1982). ''Oowekeeno oral traditions as told by the late chief Simon Walkus, Sr.'' Hilton, S.; & Rath, J. (Eds.). Mercury series (No. 84). Ottawa: National Museum of Man.