De Goeje, Claudius H. 1930. "The Inner Structure of the Warao Language of Guiana." In Journal de la Société des Americanistes de Paris, 22: 23-72.
Zigmond, Maurice L., Curtis G. Booth and Pamela Munro. 1000. "Kawaiisu: a Grammar and Dictonary with Texts." 119: University of California Press.
Zenk, Henry B. 1990. "Siuslawans and Coosans." In Handbook of North American Indians. Volume 7: Northwest Coast, edited by Wayne Suttles. 572-579. Smithsonian Institution.
