Thompson, Sandra A., Joseph Sung-Yul Park & Charles N. Li. 2006. A Reference Grammar of Wappo. (University of California Publications in Linguistics, 138.) Berkeley and Los Angeles: University of California Press. xviii+172pp.
http://repositories.cdlib.org/cgi/viewcontent.cgi?article=1006&context=ucpress/ucpl
@book{thompson2006wappo, address = {Berkeley and Los Angeles}, author = {Sandra A. Thompson and Joseph Sung-Yul Park and Charles N. Li}, pages = {xviii+172}, publisher = {University of California Press}, series = {University of California Publications in Linguistics}, title = {A Reference Grammar of Wappo}, url = {http://repositories.cdlib.org/cgi/viewcontent.cgi?article=1006&context=ucpress/ucpl}, volume = {138}, year = {2006} }