ISBN 3-929075-24-5* William H. Jacobsen Jr. (1979): "Wakashan Comparative Studies" in "The languages of native America: Historical and comparative assessment", Campbell, Lyle; & Mithun, Marianne (Eds.
* William H. Jacobsen Jr. «Wakashan Comparative Studies» // The languages of native America: Historical and comparative assessment, Campbell, Lyle; & Mithun, Marianne (Eds.